|
JavaScript - Undetected Error Handling In Callback
so, I should start by saying that I don't really understand callbacks (but I understand what they do), and here's the thing:
html5 browser geolocation has an error callback which works fine EXCEPT if the user is using FF and refuses to share their location. In IE and Chrome, this produces a "permission denied" error which you can then handle. But firefox just sits there because it never receives the error. Here's an example - click on Not now in FF to see what I mean. So the only solution I can see is to make some special case for FF and this is where my question comes in - can I set a condition within the callback that says something like if it wasn't successful, but you didn't get an error, do this... I thought that if (!position&&!error) {useMaxMind("Firefox fallback"); } might do it, but it can't go in the error callback (I guess because that only fires if an error is detected) and it doesn't work in the main function (I guess because if that code runs it means the location has been found)... anyway. Here's what I have for the moment, which just sets a timeout as soon as it loads. It would be nice to have something a bit more elegant, though. thanks in advance... Code: function initialize() {
// try W3C standard approach
var geoTimeout = 10000;
var timeOuthandler = setTimeout("useMaxMind('Timeout')", geoTimeout);
if(navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
var latLong = new google.maps.LatLng(position.coords.latitude,position.coords.longitude);
alert("geolocation successful");
clearTimeout(timeOuthandler);
showMap(latLong, 16);
}, function (error) {
switch (error.code) {
case 0:
message = "Something went wrong: " + error.message;
break;
case 1:
message = "You denied permission to this page to retrieve a location.";
break;
case 2:
message = "The browser was unable to determine a location: " + error.message;
break;
case 3:
message = "The browser timed out before retrieving the location.";
break;
} clearTimeout(timeOuthandler);
useMaxMind(message);
}, {timeout:geoTimeout} );
} else {
useMaxMind("No browser support");
}
}
Similar TutorialsI'm updating a database w/o "reloading" the page using jquery & ajax. Everything works fine, but I need to display an error (in php - mysql_error()) in the error callback function. I also don't think that the success/error callbacks are working as even when I changed the password in to the mysql server in the php file, I got the success message :S Can any1 help me out? this is the php script Code: <?php
/*$fp = fopen('data.txt', 'a+');
fwrite($fp, 'ok');
fclose($fp);*/
$sections = $_REQUEST['sections'];
$fontColor = $_REQUEST['fontColor'];
$bgcolor = $_REQUEST['bgcolor'];
$font = $_REQUEST['font'];
$fontSize = $_REQUEST['fontSize'];
$lineHeight = $_REQUEST['lineHeight'];
$letterSpacing = $_REQUEST['letterSpacing'];
$fontStyle = $_REQUEST['fontStyle'];
//$tekst = $_REQUEST['tekst']
$connect = mysql_connect("localhost", "root", "password") or die ("Unable to connect to the database");
mysql_select_db("ipsum") or die ("doesnt exist: " . mysql_error());
$update = "INSERT INTO con (Sections, Fontcolor, BackgroundColor, Font, FontSize, LineHeight, LetterSpacing, FontStyle) VALUES ('".$sections."', '".$fontColor."', '".$bgcolor."', '".$font."', '".$fontSize."', '".$lineHeight."', '".$letterSpacing."', '".$fontStyle."')";
// the content of 'data.txt' is now 123 and not 23!
mysql_query($update) or die ("unable to update: " . mysql_error());
mysql_close($connect);
?>
and this is what I currently have for the error Code: error: (function (){$('#errorMessage').fadeIn("slow").delay(1000).fadeOut(2000);}),
but that needs to change... Hi, I having problems using 'this' in an objects method. I have simplified the problem - see image. I instantiate object obj1 which inturn instantiates subObj1. subObj1 is a slave to obj1. obj1 registers a handler function called method1 with subObj1 so that subObj1 can tell obj1 when it has finished. For example: call subObj1.subMethod2() to get the sub object to do something. subObj1 calls subMethod1 when its finished with its task, which inturn causes method1 to be called. If I call method1 directly from obj1 'this' refers to obj1. However when method1 gets called by the subObj1 through the event handler mechanism, I find that 'this' has been changed to refer to subObj1. This is a problem as now method1 has lost all connection with its object obj1. If I define method1 within the 'Class1' function, I can get it to work if I use the 'var me = this;' trick, but if you have lots of methods within Class1() with further nesting this can get a bit hard to read. So, can someone tell me how to deal with 'this' changing. I.e. I want 'this' to refer to obj1 within method1. Code: <html>
<body>
<script type="text/javascript">
function Class1(){
this.prop1 = "prop";
this.subObj1 = new SubClass1(); //sub-object
this.subObj1.subMethod1 = this.method1; //register handler
}
Class1.prototype.method1 = function(){
console.log(this.prop1);
}
function SubClass1(){
this.prop1 = "subObjProp";
this.subMethod1;
this.subMethod2 = function(){ this.subMethod1(); };
}
obj1 = new Class1();
obj1.method1(); //prints 'prop'
obj1.subObj1.subMethod2(); //prints 'subObjProp'
</script>
</body>
</html>
On another note, there seems to many ways of defining methods (e.g using 'prototype' etc etc) and I gettting sick and tierd of a 'trial and error' approach to get things working. Can anyone recomend a good resourse that sets out the best way to design with javascript so I dont keep running into these issues. (E.g. is my scheme of communicating with sub-objects a bit crazy, and is there a better way.) Thanks. So I hacked up a version of the wowSlider to work as a timed rotating background... I need to know how to add a callback funtion so that I can make the Image and link that is in front of the wowSlider to change each time the background changes. Here is what I have so far: http://www.eclipse2.com/testing/new_layout/ Help would be greatly appreciated. The only way I can figure out to invoke an event handler, like onchange or jquery's change, after an ajax response is rendered to page is by triggering event handler within the ajax call. Is there a better way to do this? It looks like bad code but this is only where I am at right now in rendering a table to page and now allowing user filtering: (function($){ var listview = $('#listview'); $('#dashboard a').click(function(){listLoader(this);}) var listLoader = function(context, options){ for(var i = 0; i < arguments.length; i++){ var data = arguments[1] } var url = context.href.substring(context.href.lastIndexOf('#') + 1); $.ajax({ type: 'GET', url: '/' + url, data: data, dataType: 'html', error: function(){}, beforeSend: function(){}, complete: function() {}, success: function(response) { listview.html(response); $("select").change(function(){ var option = $(this).val(); listLoader(context, option); }) //end for change } }) } })(jQuery) Could somebody help me please to explain what I'm doing wrong.... a have this html file with references to some javascripts (datagrid from http://www.datatables.net) and this html file work ok..I mean javascripts a css styling works with table... but when I call this page by ajax and callback (this html page) is forward back into another div , table doesn't work ....just data from page but now functionality from javascript and css styling... how should I force callback result to use javascript and css? Code: <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html><head>
<meta http-equiv="Content-type" content="text/html; charset=UTF-8">
<link rel="shortcut icon" type="image/ico" href="http://www.datatables.net/media/images/favicon.ico">
<link rel="alternate" type="application/rss+xml" title="RSS 2.0" href="http://www.datatables.net/rss.xml">
<style type="text/css" media="screen">
@import "media/css/demo_page.css";
@import "media/css/demo_table.css";
@import "http://www.datatables.net/media/css/site_jui.ccss";
@import "media/css/demo_table_jui.css";
@import "media/css/themes/base/jquery-ui.css";
@import "media/css/themes/smoothness/jquery-ui-1.7.2.custom.css";
/*
* Override styles needed due to the mix of three different CSS sources! For proper examples
* please see the themes example in the 'Examples' section of this site
*/
.dataTables_info { padding-top: 0; }
.dataTables_paginate { padding-top: 0; }
.css_right { float: right; }
#example_wrapper .fg-toolbar { font-size: 0.8em }
#theme_links span { float: left; padding: 2px 10px; }
</style>
<script type="text/javascript" src="media/js/complete.js"></script>
<script src="media/js/jquery-1.4.4.min.js" type="text/javascript"></script>
<script src="media/js/jquery.dataTables.min.js" type="text/javascript"></script>
<script type="text/javascript" src="media/js/jquery.dataTables.editable.js"></script>
<script src="media/js/jquery.jeditable.js" type="text/javascript"></script>
<script src="media/js/jquery-ui.js" type="text/javascript"></script>
<script src="media/js/jquery.validate.js" type="text/javascript"></script>
<script type="text/javascript" charset="utf-8">
$(document).ready( function () {
$('#example').dataTable().makeEditable({
sUpdateURL: "update.php",
sDeleteURL: "delete.php"
});
} );
</script>
</head>
<body id="index" class="grid_2_3">
<table cellpadding="0" cellspacing="0" border="0" class="display" id="example">
<thead>
<tr>
<th>
ID</th>
<th>
user</th>
<th>
password</th>
<th>
first</th>
<th>
last</th>
<th>
company</th>
</tr>
</thead>
<tbody>
<tr class="even_gradeA" id="1">
<td>
1
</td>
<td>
XY
</td>
<td>
passwoed
</td>
<td>
Ja
</td>
<td>
jajovic
</td>
<td>
2
</td>
</tr>
<tr class="even_gradeA" id="2">
<td>
2
</td>
<td>
jojo
</td>
<td>
fa25af5301e2dda1fddea740200aa10ab6c70d86
</td>
<td>
jojo
</td>
<td>
jojovicko
</td>
<td>
2
</td>
</tr>
<tr class="even_gradeA" id="3">
<td>
3
</td>
<td>
kuk
</td>
<td>
d588aebb93e3adf70eac1fb479d6d53f9dc21816
</td>
<td>
kuk
</td>
<td>
kukovic
</td>
<td>
3
</td>
</tr>
<tr class="even_gradeA" id="10">
<td>
10
</td>
<td>
admin
</td>
<td>
f865b53623b121fd34ee5426c792e5c33af8c227
</td>
<td>
admin
</td>
<td>
adminovic
</td>
<td>
3
</td>
</tr>
</tbody>
</table><button id="btnDeleteRow">Delete</button>
</body>
</html>
I have a project that uses and Ajax call but it appears that the call back function cannot take arguments, nor return values. However, I have wrapped another function inside the call back function that takes xmlhttp.responseText as the argument and returns values that are supposed to be placed in a global array. If I do, for instance: callback function code.... globalArray = someFunction(xmlhttp.responseText) alert(globalArray), I get the expected values. but a function is called later to query the contents of the global array the global array is empty (No other code or functions exist in this project to alter the global array) Primary dev client is FireFox 3x on Mac OSX Is this a bug, or is there some other aspect of javascript that I need to know about? I am using ajax here because javascript does not have an array shuffling function and php does. So I send an array to the server, have it shuffled by the server and returned to the requesting page. I've used js only for simple form validations thus far. I've been working on a coldfusion/ajax dynamic select list for a few days and just about have it functioning the way I want it. My question is this. Whats the best way, if any, to handle users who turn js off. What I mean is, I have so far three separate queries for my three select lists, and are populated with ajax calls. Is there a way to get the same functionality with standard queries and page refreshes in case a visitor does have js disabled? Thanks for any tips and advice. Hi everyone; I have created a JavaScript function to show either a enabled or a disabled text input field depending on whether a checkbox has been clicked or not. It works great for that purpose. However, when I use it for more than one text input field and I submit the form, it goes back to its disabled form. This is a problem if you by mistake submit the form without filling all the fields. As I said, the submit button makes the form go disabled. Is there a way to either not have the form go disabled after submission or to have a "Oncheck" function so I can use $_SESSION to keep the checked attribute? Thanks in advance for all your help Code: <html>
<head>
<style type="text/css">
#Active {
display:none;
}
</style>
<script type="text/javascript">
function toggle() {
if (document.getElementById) {
if (document.getElementById("checkbox").checked == true) {
document.getElementById("Active").style.display = "block";
document.getElementById("Inactive").style.display = "none";
} else {
document.getElementById("Inactive").style.display = "block";
document.getElementById("Active").style.display = "none";
}
}
}
</script>
</head>
<body>
<?php
echo "Add Field";
echo "<input type=\"checkbox\" name=\"check\" id=\"checkbox\" onClick=\"toggle();\" value=\"v\"/>";
echo "<form method=\"post\">";
echo "<div id=Active>";
if(isset($_SESSION['test']) && $_SESSION['test']!="")
{
echo "<input name=\"test\" value=\"". $_SESSION['test']."\" type=\"text\" />";
}
elseif(isset($_POST['test']) && $_POST['test']!="")
{
echo "<input name=\"test\" value=\"". $_POST['test']."\" type=\"text\"/>";
}
else
{
echo "<input name=\"test\" type=\"text\"/>";
}
echo "<input type=\"text\" name=\"test2\" >";
echo "</div>";
echo "<div id=Inactive>";
echo "<input type=\"text\" disabled>";
echo "<input type=\"text\" disabled>";
echo "</div>";
echo "<input type=\"submit\">";
echo "</form>";
$test = $_POST['test'];
$_SESSION = $_POST['test'];
$test2 = $_POST['test2'];
$_SESSION = $_POST['test2'];
echo $test;
?>
</body>
</html>
Hi I am new to Javascript. I am working in keyboard Event handling. i dont know how to handle multple keys pressed or sequence of keys pressed. Want to know more about key holding , key Listener. I don't know how I should do ? Quote: <html> <head> <script type="text/javascript"> function add(a,b){ y=a+b return y } var aaa = add(one,two) //one needs to get somehow get the value of yil, in this case 10 var one = function reas(){i=10;if(i<10){yil = 15}; else{yil = 10; yil = one;}; var two = 20; document.write(y) </script> </head> </html> also why doesn't this work? Quote: <html> <head> <script type="text/javascript"> function adder(a,b){ var k=a+b; return k } var hes=adder(5,kol); kol=40; alert(hes); </script> </head> </html> you cannot have variables in callback functions? Long time since I have been on here been really busy with college etc, I am in need of some help / advice on how to get my head around something I need to do. Basicly I want to do is be able to do two kinds of AJAX requests in one function called AJAX. Example of type one: Code: AJAX('div#example',{
type: 'post',
url: 'example.php',
params: {do:'test',type:2},
success: function(o) {
this.innerHTML = o.responseText;
}
});
The above code will set the innerHTML of the div with an id equaling 'example' with everything that is visible on the page example.php when the parameters are do=test&type=2. Example of type two: Code: var div = document.getElementById('example'),
example = AJAX({
type: 'post',
url: 'example.php',
params: {do:'test',type:2}
});
if(div && example.responseText) {
div.innerHTML = example.responseText;
}
The above code does the same thing as the code in example one but this time there is no success function but everything has been assigned to the variable 'example' which has now become an object. Basicly what I need to know is in a function like this. Code: function AJAX(t,o) {}
How can I assign the current AJAX response to the success function but still be able to use 'this' to refer to the object for 'div#example', and with the second example how can I assign the AJAX response to the variable for use after the AJAX call has been done? Thank you in advance... - DJCMBear Resolved!
I don't have much experience in Javascript and would like to hear your suggestions before choosing which direction to pursue for my project. I want to design a web page which allows a user to input a file which contains a list of addresses. Then send these addresses to Google Maps API for geocoding and returned XY coordinates will be saved in a file and downloaded to the PC. Can this be done completely in Javascript(client side handling) or the input addresses need to be sent to a server and let the server talk to Google Maps API to complete geocoding and then send back the coordinates data to the browser(sever side handling). Please help!
Hi, I have a func1() called when mouseOver even fired. And while the func1() is executing if mouseOut event fires I want to exit the func1(). If anybody knows how to do this please let me know. Thanks I've been looking at the specs for javascript, but I don't understand results I'm getting. A Date object is calculated from the number of milliseconds since Jan 1, 1970. A PHP DateTime object is calculated from the number of seconds since Jan 1, 1970, so from the latter, add three zeros, and you have milliseconds. The issue I have happens when I set the date. Below is the result of a test already filled out when I entered April 23, 2000 @ 17:00Hrs. The resulting alert shows 17:0, which is correct. But change the date to, say, 1981 and try it again. The corresponding timestamps are 356922000 and 356922000000 (Hard to see? That's '356922' ending in three zeros and six zeros respectively ;-)). My alert now reports 18:0! Since the timestamp should be good for any time after Jan 1, 1970, why is the display off for a date in this year? What mechanism is responsible for this? Yep, that's it. I'd really like to know, though... Code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Simple Time Test</title>
<link href="notifications.css" rel="stylesheet" type="text/css" media="screen" />
<script language="javascript" type="text/javascript">
function display_time(){
var theTime=new Date();
theTime.setTime(956534400000);
alert(theTime.getHours()+':'+theTime.getMinutes());
}
</script>
</head>
<body>
<form>
<input type='button' onclick='display_time();' value='click' />
</form>
<?PHP
/*
1. First put a date and time in the setDate() and setTime() calls.
2. Run this. The result will be a timestamp. Place that in the setTimestamp call, AND copy it into the setTime javascript call,
appended with three zeros (to go from seconds to milliseconds).
3. I'm finding that when the alert pops up, the time it displays is not always the same as the output from the echo statement!
*/
echo '<br />';
$t3_var = new DateTime();
$t3_var->setDate(2000,04,23);
$t3_var->setTime(17,0);
echo 'timestamp: ' . $t3_var->getTimestamp();
echo '<br />';
$decoder1 = new DateTime();
$decoder1->setTimestamp(956534400);
echo 'time: ' . $decoder1->format('m-d-Y, H:i') . '<br />';
?>
</body>
</html>
Hi I am using httpXmlRequest object to call a xml web service. In order to successfully perform a task there are couple steps need to happen. 1 you have to request for a session (cookie) 2 with the cookie, we need to authenticate with the server 3 then perform other actions snippet of my code looks something like this. Basically here i am trying to get the cookie, login and then logout once logged in. function connect() { document.myForm.elements['myTextArea'].value += "connecting to teh server.\n"; try { xhttp.open("GET",urlStr + commonInfoParam, true); xhttp.send(); xmlDoc = xhttp.responseXML; xmlDoc.onreadystatechange = function () { if(xmlDoc.readyState == 4) { var resultsTag = null; resultsTag = xmlDoc.getElementsByTagName("results"); if(resultsTag != null) { for(i=0;i<resultsTag.length;i++) { var commonTag = resultsTag[i].getElementsByTagName("common"); for(j=0;j<commonTag.length; j++) { cookie = commonTag[j].getElementsByTagName("cookie")[0].childNodes[0].nodeValue; break; } } } if(cookie != null) { document.myForm.elements['myTextArea'].value += "cookie found: " + cookie + "\n"; login(); } } }; } catch(e) { document.myForm.elements['myTextArea'].value += "Exception occurred at connect: " + e.message + "\n"; } } function login() { var loginRequestURL = "http://testconnect.com/api/xml?action=login&login=" + username+ "&password=" + password + "&session=" + cookie; try { xhttp.open("GET", loginRequestURL, true); xhttp.send(); xmlDoc = xhttp.responseXML; xmlDoc.onreadystatechange = function () { alert('in loginResponseHandler'); if(xmlDoc.readyState == 4) { try { loginStatus = xmlDoc.documentElement.childNodes[0].attributes.getNamedItem("code").nodeValue; if(loginStatus == 'ok') { alert("login is good: " + loginStatus); logout(); } else { } } catch(e) {} } }; } catch(e) { } } function logout() { alert("in logout"); try { xhttp.open("GET", logoutRequestURL + cookie, true); xhttp.send(); xmlDoc = xhttp.responseXML; xmlDoc.onreadystatechange = function () { alert("in logoutResponseHandler"); if(xmlDoc.readyState == 4) { try { status = xmlDoc.documentElement.childNodes[0].attributes.getNamedItem("code").nodeValue; if(status == 'ok') { alert(status); } } catch(e) {} } }; } catch(e) {} } so when I run my code in the browser, all my alert stages give me proper message as expected. But at the final alert, it hangs. I just could not figvure out what am i doing wrong. can any one pin point this out for me please? Thanks in advance. KM Hi there, I've been a web designer for a while and have always used basic javascript in my pages, but decided recently that I would get right into the nitty gritty, however I'm having a problem with some really basic code. Secondly, the book which I'm using is from 2005 and is extolling the virtues of event listeners and so on, is this still the accepted means of handling events? And thirdly, are there still chasms between the browsers in compatability in this area? I'm aware IE has become more and more compliant recently, is it still necessary to write code to cover different browsers or does it all pretty much work nowadays (besides older browsers)? So, to the code! Basically, the browser doesn't get into the function to display the alert(), and i'm not sure why. (Told you it was basic ) Code: <html>
<head>
<title>Javascript Testing</title>
<script type="text/javascript">
<!--
function aKeyWasPressed(e){
alert('Sausages!');
}
var textarea = document.getElementById('myta');
textarea.addEventListener('keyup', aKeyWasPressed, false);
-->
</script>
</head>
<body>
<textarea id="myta"></textarea>
</body>
</html>
Thanks! Hi, I think the problem I am having is an event not a css issue, so I hope I posted in the right forum. What I am trying to achieve is the capability to provide multiple instant chat messages. I have the php/ajax for the instant messages, what I am not sure is how to be able to view multiple chats. What I have started to do is limit it to five possible instant chat messages and have five divs in place with visibility hidden. It works fine for one. But if someone clicks on the name of a person they wish to chat with, the way I am currently doing it, I would need to find out: 1. which divs were free to start an instant chat in (I have no idea how to do this with divs)? 2. Having identified it I will need to change the visibility so it suddenly becomes visible I guess firstly am I going about this the right way to be able to host/view multiple chats? My code is below. Main Page PHP Code: <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.3/jquery.min.js"></script> <script type="text/javascript"> $(document).ready(function (){ $('#submitchat').live('click',function(){ var data = $('#chatmessage').serialize(); $.post ('insertChat.php',data, function(){ $('#chatmessage').each (function(){ this.reset(); }); return false; }); }); }); </script> <script type="text/javascript"> function loadChat(File,ID,Msg,TID,Cile){ loadXMLDoc1(File,ID,Msg); delay = setTimeout(function(){loadChatRefresh(Cile,TID,Msg)},5000); } </script> <script type="text/javascript"> function loadChatRefresh(File,ID,Msg){ if (window.XMLHttpRequest) { xmlhttp=new XMLHttpRequest(); } else { try{ xmlhttp=new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } } xmlhttp.onreadystatechange=function(){ if (xmlhttp.readyState==4 && xmlhttp.status==200){ document.getElementById(ID).innerHTML=xmlhttp.responseText; timer = setInterval(function(){loadChatRefresh(File,ID,Msg)},3000); } } var params=Msg; xmlhttp.open("POST",File,true); xmlhttp.setRequestHeader("Pragma", "Cache-Control:no-cache"); xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); xmlhttp.setRequestHeader("Content-length", params.length); xmlhttp.setRequestHeader("Connection", "close"); xmlhttp.send(params); } </script> <script type="text/javascript"> function loadXMLDoc1(File,ID,Msg){ if (window.XMLHttpRequest) { xmlhttp=new XMLHttpRequest(); } else { try{ xmlhttp=new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } } xmlhttp.onreadystatechange=function(){ if (xmlhttp.readyState==4 && xmlhttp.status==200){ document.getElementById(ID).innerHTML=xmlhttp.responseText; } } var params=Msg; xmlhttp.open("POST",File,true); xmlhttp.setRequestHeader("Pragma", "Cache-Control:no-cache"); xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); xmlhttp.setRequestHeader("Content-length", params.length); xmlhttp.setRequestHeader("Connection", "close"); xmlhttp.send(params); } </script> </head> <body> <h1>Test</h1> <?php include("dbconnect.php"); $result = mysql_query("SELECT *, signedin.PId as SIPId FROM signedin INNER JOIN friends ON signedin.PId=friends.invited OR signedin.PId=friends.invitee WHERE ((friends.invitee={$_SESSION['MyPId']} AND friends.statae='accepted') OR (friends.invited={$_SESSION['MyPId']} AND friends.statae='accepted')) AND signedin.LogOff IS NULL AND signedin.PId !={$_SESSION['MyPId']}"); while($row = mysql_fetch_array($result)){ $mugwort= $row['SIPId'] . ';'; } $motherwort=explode(';',$mugwort); foreach ($motherwort as $mulberry){ $result = mysql_query("SELECT * FROM allusers WHERE PId='{$mulberry}'"); while($row = mysql_fetch_array($result)){ $nosegay=rand(). rand(). rand(). rand(). rand(); $nightshade="{$_SESSION['MyPId']};{$mulberry};{$nosegay}"; echo '<div class="img"><img src="thumbs/' . $row['pphoto'] . '" height="80px" width="80px" onclick="loadChat(\'chat.php\',\'chat1\',\'olivier=' . urlencode($nightshade) . '\',\'chatdisplay\',\'getDisplayChat.php\')";><div class="desc">' . $row['fullname'] . '</div></div><br />'; } } echo '<br /><div class="clear"></div><br /><br />'; ?> <div class="chat1" id="chat1"></div> <div class="chat2" id="chat2"></div> <div class="chat3" id="chat3"></div> <div class="chat4" id="chat4"></div> <div class="chat5" id="chat5"></div> <br /> <br /> Chat Page PHP Code: <?php include("dbconnect.php"); $blossom=explode(';',$_POST['olivier']); $periwinkle=$blossom[0]; $peppermint=$blossom[1]; $pine=$blossom[2]; global $periwinkle; global $peppermint; global $pine; echo '<div class="chatbanner" width="100%"> <table width="100%"> <tr> <td width="90%">'; echo '<center><b>This Name</b></center>'; echo '</td> <td width="5%">'; echo '<input type="button" class="buttonchat" name="minimize" id="minimize" value="−">'; echo '</td> <td width="5%">'; echo '<input type="button" class="buttonchat" name="minimize" id="minimize" value="X">'; echo '</td> </tr> </table></div>'; echo '<div class="chattext" id="chatdisplay" overflow="scroll">'; $result = mysql_query("SELECT * FROM chat INNER JOIN allusers ON chat.chatter=allusers.PId WHERE (chat.chatter={$periwinkle} AND chat.chattee={$peppermint}) OR (chat.chatter={$peppermint} AND chat.chattee={$periwinkle}) AND ref={$pine} ORDER BY chat.date DESC"); while($row = mysql_fetch_array($result)){ echo '<table width="100%"><tr><td width="20%"><img src="thumbs/' . $row['pphoto'] . '" width="40px" height="40px"></td>'; echo '<td width="80%" valign="top">' . nl2br($row['message']) . '</td></tr></table><hr />'; } echo '</div><br /><br />'; echo '<form action="insertChat.php" method="post" name="chatmessage" id="chatmessage"> <input type="text" class="hidden" name="from" id="from" value="' . $_SESSION['MyPId'] . '"> <input type="text" class="hidden" name="to" id="to" value="'; echo ($_SESSION['MyPId']==$peppermint) ? $periwinkle : $peppermint . '"> <input type="text" class="hidden" name="ref" id="ref" value="' . $pine . '">'; echo '<div class="textchat">'; echo '<textarea cols="21" row="5" name="message" id="message"></textarea>'; echo '<input type="button" name="submitchat" id="submitchat" value=" "></div></form>'; ?> Style Sheet: Code:
div.chat1 {
position:fixed;
bottom:1px;
right:50px;
width:200px;
height:250px;
float:right;
border:2px solid black;
background-color:#fdf5e6;
scrolling:auto;
}
div.chat2 {
position:fixed;
bottom:1px;
right:260px;
width:200px;
height:250px;
float:right;
border:2px solid black;
background-color:#fdf5e6;
scrolling:auto;
}
div.chat3 {
position:fixed;
bottom:1px;
right:470px;
width:200px;
height:250px;
float:right;
border:2px solid black;
background-color:#fdf5e6;
scrolling:auto;
}
div.chat4 {
position:fixed;
bottom:1px;
right:680px;
width:200px;
height:250px;
float:right;
border:2px solid black;
background-color:#fdf5e6;
scrolling:auto;
}
div.chat5 {
position:fixed;
bottom:1px;
right:890px;
width:200px;
height:250px;
float:right;
border:2px solid black;
background-color:#fdf5e6;
scrolling:auto;
}
.chatbanner {
background-color:#4b0082;
text-decoration:none;
color:white;
}
.textchat {
position:fixed;
bottom:0.5px;
}
.chatbutton {
position:fixed;
bottom:0.5px;
right:0.5px;
border:none;
}
If I have left anything out which might be helpful please let me know. I just got stuck on the logistics side of figuring out how was the best way to make this happen, any pointers would be great. Hopefully the title isn't too confusing, I shall explain... I'm a basic PHP/javascript developer and I need to build a series of forms where info is passed from page to page and there will be a need to skip to different sequences of pages depending upon answers given. I have distilled this into a small example (try.php) where I can set my page destination using javascript but I'd like to be able to set a session variable to store the form data to reuse it on other pages. Because I haven't used a form action then the result doesn't get stored. This example should make it clearer... Here is a simple form, I send the visitor to either page 1 or page 2 depending on their radio button choice: Code: <script type="text/javascript">
function OnSubmitForm()
{
if(document.myform.destination[0].checked == true)
{
document.myform.action ="pg1.php";
}
else
if(document.myform.destination[1].checked == true)
{
document.myform.action ="pg2.php";
}
return true;
}
</script>
<form name="myform" onsubmit="return OnSubmitForm();">
name: <input type="text" name="name"><br>
email: <input type="text" name="email"><br>
<input type="radio" name="destination" value="1" checked>go to page 1<br>
<input type="radio" name="destination" value="2">go to page 2
<p>
<input type="submit" name="submit" value="go">
</p>
</form>
This works fine inasmuch as it takes the visitor to the correct page, however I'd like to store the name entered as a session variable and reuse it on page 1 (or page 2). page1.php looks like this (and page 2 is very similar): Code: <?php
session_start();
// debug - turn on error reporting
error_reporting(E_ALL | E_NOTICE);
ini_set('display_errors', '1');
//Store our posted values in a session variable
if (isset ($_POST['name'])) {
$_SESSION['name'] = $_POST['name'];
}
else {
$_SESSION['name'] = null;
}
echo ("Session variable is set to: ".$_SESSION['name']);
?>
<h1>welcome to page 1</h1>
I'm sure that pg1.php would work if I had used a form action but I need the ability to send the visitor to different pages on form submission Is it possible to write the name to a session variable in try.php (I guess using javascript/ajax)? Thanks for any hints and examples Nigel I can get this code to take two separate sections of a file which are not beside each other and write them into another file. It always comes up as a single full line of the code instead of the sections I want. The code includes the student number first name last name and three results of assignments. I want the code to write the student number and three results of all the students into a file and then work out the average of the student results. Can you help? Code: try{
while (in.hasNextLine())
{
String line = in.nextLine();
out.println( line);
int i=0;
if(!Character.isDigit(line.charAt(i))) { i++; }
studentStringNumber = line.substring(0, i);
String stringResult = line.substring(i);
studentStringNumber = studentStringNumber.trim();
stringResults = stringResults.trim();
double stringResultsValue = Double.parseDouble(stringResults.trim());
stringResults = in.nextLine();
studentStringNumber = in.nextLine();
studentNumber = Integer.parseInt(studentStringNumber);
if(in.hasNextInt())
{
int value = in.nextInt();
}
results = Double.parseDouble(stringResults);
if(in.hasNextDouble())
{
double value = in.nextDouble();
}
Scanner lineScanner = new Scanner(line);
studentStringNumber = lineScanner.next();
while(!lineScanner.hasNextDouble())
{
studentStringNumber = studentStringNumber+ " " +lineScanner.next();
}
stringResultsValue = lineScanner.nextDouble();
}
}
|
|||||||