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JavaScript - Q: How To Define An Array Only If It Doesn't Exist?
Hi all,
I am working with the following code: Code: window.onload = (window.onload) ? window.onload : function () {
for (var i = 0; i < onload_functions.length; i++) {
eval(onload_functions[i]);
}
}
...and it's used like this: onload_functions.push('runSomeJS()'); The idea is that IF the "window.onload" function doesn't exist, I supply my own. My problem is that this code also uses an array: var onload_functions = new Array(); Now this array will not be present if the "window.onload" function is not present. So I need to also define it conditionally. I tried this: onload_functions = (onload_functions) ? onload_functions : new Array(); ...but it doesn't work. I also tried: onload_functions = (onload_functions) ? onload_functions : onload_functions = new Array(); ...doesn't work either. I'm sure the solution is simple, but I'm just not seeing it. Any ideas? Thanks! -- Roger Similar TutorialsanotherVar should be -1 if there are no matches, but it doesn't seem to work
PHP Code: var string = "abadafa"; var matches = string.match(/a/gi); //doesn't work with /z/ for example var anotherVar = matches.length || -1; The default operator should return the second value if the first is null or false, and according to PHP Code: try { alert(matches.length); } catch (e){ alert(e); //alerts null } it's null. fyi: http://helephant.com/2008/12/javascr...ault-operator/ What's going on? Hi everyone! I am building a simple web application in which the user inputs some html code in a <textarea> and the corresponding result (output of the code) is shown! The problem I am facing is that suppose the user enters some code and wishes to wrap it inside specific tags (e.g. <script></script>) then she just selects the corresponding code and clicks a predefined button and the selected code gets wrapped inside those tags! Now, what I am thinking right now is that when the user selects some code and clicks the button the selected text goes inside a variable (e.g. old_variable) and a new variable (new_variable = "<script>" + old_variable + "</script>") is returned! But I was just wondering how to send the selected code in the variable i.e. old_variable using JavaScript? Any help/hint/suggestion/advice would be highly valuable for me! Thanks! I hope you will forgive the ineptitude of this question, but I'm starting from a severely beginner's level! In my website, I want each button clicked on the home page to define a variable URL that determines which 'default' page is navigated to first when people visit the Gallery section. i.e. If the "About Racing" link is clicked, then when the Gallery section fires up, the first page/picture seen is the Racing Car pic page. I am sure this is possible, but haven't managed to work out quite how to do it.... Any help will be very gratefully received! I currently have a navigation bar with CSS. It sits by itself in a frame so it doesn't change with the other page turns. So I'm trying to figure out how to set each link class="active" since it always stays on the same page. I'm thinking javascript will be my friend. Is there an onclick function that can be defined? I'm not new to webpages but new to learning javascript, instead of borrow someone's code. I didn't know how to approach this code because I think I need it to say: If Onclick, then set to class="active", otherwise (then), set class="nothing" or anything to this regard. I was not sure how I could approach that code and how to fit into the UL/LI html code I currently have setup as well as the head code. Example code: (I have 3 frames called head, form, and body. Head is the nav bar where this code sits.) Code: <ul class="menu"> <li><a href="choose.htm" class="active"><span>Home</span></a></li> <li><a href="search.htm" target="form" onClick="top.body.location='http://www.google.com';"><Span> Google</span></a></li></ul> With my CSS code, the "menu" defines some colors/setup, as so does Span and class="active". As a bonus, if you could teach me instead of just help me, it would help me help others. My javascript compiler is telling me that my function doesn't exist. However its just because the function isn't compiling right... if someone could give it a look and tell me what i'm doing wrong i would greatly appreciate it. Code: <script type="text/javascript">
function Country(f,s,h,k)
{
var Country=['Alabama','Alaska','Arizona','Arkansas','California','Colorado','Connecticut','Delaware','Florida','Georgia','Hawaii','Idaho','Illinois','Indiana','Iowa','Kansas','Kentucky','Louisiana','Maine','Maryland','Massachusetts','Michigan','Minnesota','Missippi','Missouri','Montana','Nebraska','Nevada','New Hampshire','New Jersey','New Mexico','New York','North Carolina','North Dekota','Ohio','Oklahoma','Oregon','Pennsylvania','Rhode Island','South Carolina','South Dakota','Tennessee','Texas','Utah','Vermont','Virginia','Washington','West Virginia','Wisconsin','Wyoming'];
var first=$('#'+f).val();
var second=$('#'+s);
var hidden=$('#'+h);
if(first=="USA")
{
hidden.css('display','block');
var options="";
for(var i=0;i<=(Country.length-1);i++)
{
options+="<option value='"+Country[i]+"'>"+Country[i]+"</option>";
}
second.html("<option selected='selected'>Choose one...</option>"+options);
} else {
hidden=$('#'+k);
hidden.css('display','block');
}
}
</script>
Code: <tr style="background-color: #f4fbee">
<td width="324"><font face="verdana" size="2">9.) Country</font></td>
<td width="324">
<select name="Country" id="Country" onchange="Country('Country','state','stateother1','stateother2');">
<option value="none" selected="selected">Choose one...</option>
<option value="Australia">Australia</option>
<option value="Canada">Canada</option>
<option value="UK">United Kingdom</option>
<option value="USA">United States</option>
<option value="Other">Other</option>
</select>
</td>
</tr>
that is where I call the function. Hi, Here's a sample form: Code: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Sample form</title>
<script type="text/javascript">
function displayResult() {
alert(document.myForm.myInput.value);
}
function getFocus() {
if (document.myForm.myInput.value == document.myForm.myInput.defaultValue) {
document.myForm.myInput.value = "";
}
}
function loseFocus() {
if (document.myForm.myInput.value == "") {
document.myForm.myInput.value = document.myForm.myInput.defaultValue;
}
}
</script>
</head>
<body>
<form name="myForm" method="get" onsubmit="return false;" action="">
<input name="myInput" value="Hello world!" onfocus="getFocus();" onblur="loseFocus();"><br>
<input type="button" onclick="displayResult();" value="Display input value">
</form>
</body>
</html>
It works with no problem, but the following doesn't: Code: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Sample form</title>
<script type="text/javascript">
var x = document.myForm.myInput;
function displayResult() {
alert(x.value);
}
function getFocus() {
if (x.value == x.defaultValue) {
x.value = "";
}
}
function loseFocus() {
if (x.value == "") {
x.value = x.defaultValue;
}
}
</script>
</head>
<body>
<form name="myForm" method="get" onsubmit="return false;" action="">
<input name="myInput" value="Hello world!" onfocus="getFocus();" onblur="loseFocus();"><br>
<input type="button" onclick="displayResult();" value="Display input value">
</form>
</body>
</html>
What's wrong with it and how can I define a global variable to be used by all the functions? Many thanks in advance! Mike Hi, I'm using ColdFusion to handle the login function for users (see login_form.cfm below). Have to click in the username box to be able to start typing. What's the best way to define the focus to be on the username when the page initially loads? Thanks <form method="post"> Username: <input type="Text" name="username"><br> Password: <input type="Password" name="password"><br> <input type="Submit" value="Login" name="login"> </form> i have a problem. i want to check that whether an element with a specific id exist on page or not. example Code:
<script type="text/javascript">
function bgcolo()
{
if(document.getElementById("jj") == null)
{
return red;
}
else
{
return green;
}
}
</script>
</head>
<body>
<table width="100%" border="1">
<tr>
<td id="oo" bgcolor="return bgcolo();">bvbv</td>
</tr>
</table>
<div id="jj">fggftrytyyyyyyyyy</div>
</body><
Hi all Experts I am in a need of a simple javascript script that can verify if a cokie exist If it exist: (replace the below and show) You already upgraded. If not exist: I would like it to show: You account is not upgraded yet Please upgrade your account, click here to upgrade<br> <center><A href="url"><img src="picture"></center> also need seperate script to set the cokie Hope u understand what I want thank you Never mind. I found a solution to get it working. I still don't know why it occurred, but I don't have the time to fulfill my curiosity like I could when I was a teenager. iframe Info: id="AssessmentsIFrame" button Info: id="wpv_1266351" Hi, I have a programing problem that have been around for ages. I have search on google using several expressions and words and after hours of digging i'm still unable to do it. I would like to get a value from a HTML page hosted remotely with an inconstant value. Then define this value and name as a javascript variable and apply or show in my page. Thanks for all the help P.S. Is there any way to make a domain lookup in javascript? I mean a user enters a domain and the script converts to an ip and shows to the user. If not thanks, probably it can only be done in the server side... Code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:v="urn:schemas-microsoft-com:vml">
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Washington DC</title>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript" src="scripts/downloadxml.js"></script>
<style type="text/css">
html, body { height: 100%; }
</style>
<script type="text/javascript">
var side_bar_html = "";
var gmarkers = [];
var map = null;
function createMarker(latlng, name, html) {
var contentString = html;
var marker = new google.maps.Marker({
position: latlng,
map: map,
zIndex: Math.round(latlng.lat()*-100000)<<5
});
google.maps.event.addListener(marker, 'click', function() {
infowindow.setContent(contentString);
infowindow.open(map,marker);
});
// save the info we need to use later for the side_bar
gmarkers.push(marker);
// add a line to the side_bar html
side_bar_html += '<a href="javascript:myclick(' + (gmarkers.length-1) + ')">' + name + '<\/a><br>';
}
function myclick(i) {
google.maps.event.trigger(gmarkers[i], "click");
}
function initialize() {
var myOptions = {
zoom: 14,
center: new google.maps.LatLng(38.897725,-77.036511),
mapTypeControl: true,
mapTypeControlOptions: {style: google.maps.MapTypeControlStyle.DROPDOWN_MENU},
navigationControl: true,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
map = new google.maps.Map(document.getElementById("map_canvas"),
myOptions);
google.maps.event.addListener(map, 'click', function() {
infowindow.close();
});
// Read the data from Washington.xml
downloadUrl("Washington.xml", function(doc) {
var xmlDoc = xmlParse(doc);
var marker = xmlDoc.documentElement.getElementsByTagName("marker");
for (var i = 0; i < markers.length; i++) {
// obtain the attribues of each marker
var lat = parseFloat(marker[i].getAttribute("lat"));
var lng = parseFloat(marker[i].getAttribute("lng"));
var point = new google.maps.LatLng(lat,lng);
var html = marker[i].getAttribute("html");
var label = marker[i].getAttribute("label");
// create the marker
var POI = createMarker(point,label,html);
}
// put the assembled side_bar_html contents into the side_bar div
document.getElementById("side_bar").innerHTML = side_bar_html;
});
}
var infowindow = new google.maps.InfoWindow(
{
size: new google.maps.Size(150,50)
});
</script>
</head>
<body style="margin:0px; padding:0px;" onload="initialize()">
<table border="1">
<tr>
<td>
<div id="map_canvas" style="width: 1000px; height: 600px"></div>
</td>
<td valign="top" style="width:200px; text-decoration: underline; color: #4444ff;">
<div id="side_bar"></div>
</td>
</tr>
</table>
</body>
</html>
I am working on a page where the user will select a location from a dynamically generated dropdown list. I was able to create the php multidimensional array (tested and working) from a MySql database using the users information at login, but I'm having problems converting it to a javascript multidimensional array. I need to be able to access variables that I can pass to a number of text fields within an html form. For instance, if a user belongs to a company with multiple addresses, I need to be able to let them select the address they need to prepopulate specific text fields. php array creation: Code: if ($row_locations)
{
while ($row_locations = mysql_fetch_assoc($locations))
{
$mail[$row_locations['comp_id']]=array('mailto'=>$row_locations['mailto'], 'madd'=>$row_locations['madd'], 'madd2'=>$row_locations['madd2'], 'mcity'=>$row_locations['mcity'], 'mstate'=>$row_locations['mstate'], 'mzip'=>$row_locations['mzip'], 'billto'=>$row_locations['billto'], 'badd'=>$row_locations['badd'], 'badd2'=>$row_locations['badd2'], 'bcity'=>$row_locations['bcity'], 'bstate'=>$row_locations['bstate'], 'bzip'=>$row_locations['bzip']);
}
}
javascript function - this should create the array and send variables to text fields. Code: function updateAddress() {
var mail = $.parseJSON(<?php print json_encode(json_encode($mail)); ?>);
{
if (comp_id in mail) {
document.getElementById('mailto').value=mail.comp_id.mailto.value;
document.getElementById('madd').value=mail.comp_id.madd.value;
document.getElementById('madd2').value=mail.comp_id.madd2.value;
document.getElementById('mcity').value=mail.comp_id.mcity.value;
document.getElementById('mstate').value=mail.comp_id.mstate.value;
document.getElementById('mzip').value=mail.comp_id.mzip.value;
} else {
document.getElementById('mailto').value='';
document.getElementById('madd').value='';
document.getElementById('madd2').value='';
document.getElementById('mcity').value='';
document.getElementById('mstate').value='';
document.getElementById('mzip').value='';
}
}
}
Where is this breaking? Thanks in advance. This is a script which has a window slide down on the page and a user can choose yes/no to continue. It works in all browsers other than IE...any help please? If you need more info, please let me know. Thanks. <script language="JavaScript" type="text/javascript"> <!-- var allowpop=1; function popWin(){ var ppl="popLayer";var objppl=findObj(ppl); if (objppl==null){return;}// if the layer does not exist, do nothing. var args=arguments,movetoX=parseInt(args[0]),movetoY=parseInt(args[1]),movespeed=parseInt(args[2]); var cycle=10,pxl=""; if(!document.layers){objppl=objppl.style;} if(objppl.tmofn!=null){clearTimeout(objppl.tmofn);} var pplcoordX=parseInt(objppl.left),pplcoordY=parseInt(objppl.top); var xX=movetoX,yY=movetoY;if((pplcoordX!=movetoX)||(pplcoordY!=movetoY)){ var moveX=((movetoX-pplcoordX)/movespeed),moveY=((movetoY-pplcoordY)/movespeed); moveX=(moveX>0)?Math.ceil(moveX):Math.floor(moveX);movetoX=pplcoordX+moveX; moveY=(moveY>0)?Math.ceil(moveY):Math.floor(moveY);movetoY=pplcoordY+moveY; if((parseInt(navigator.appVersion)>4||navigator.userAgent.indexOf("MSIE")>-1) && (!window.opera)) {pxl="px";} if (moveX!=0){eval("objppl.left='" + movetoX + pxl + "'");} if (moveY != 0) {eval("objppl.top = '" + movetoY + pxl + "'");} var sFunction = "popWin(" + xX + "," + yY + "," + movespeed+ ")"; objppl.tmofn = setTimeout(sFunction,cycle); } } function findObj(theObj, theDoc){ var p, i, foundObj; if(!theDoc) theDoc = document; if((p = theObj.indexOf("?")) > 0 && parent.frames.length) {theDoc = parent.frames[theObj.substring(p+1)].document; theObj = theObj.substring(0,p);} if(!(foundObj = theDoc[theObj]) && theDoc.all) foundObj = theDoc.all[theObj]; for (i=0; !foundObj && i < theDoc.forms.length; i++) foundObj = theDoc.forms[i][theObj]; for(i=0; !foundObj && theDoc.layers && i < theDoc.layers.length; i++) foundObj = findObj(theObj,theDoc.layers[i].document); if(!foundObj && document.getElementById) foundObj = document.getElementById(theObj); return foundObj; } function hideLayer(layername){ layer=findObj(layername); if(layer.style){layer=layer.style;} layer.visibility='hidden'; } // --> </script> I have a few tabs on my website. They're each set to the corresponding id in the JS file. It's supposed to add #tab-1 to the end of the URL in the users browser when it's clicked. For example, when a user is at mypage.com and they click on the tab, it ads mypage.com/#tab-1 to the end. How come it doesn't do what I want when I click it though? Here's an example of how it's setup. HTML: <a href="#tab-1" id="tab1">Text</a> JavaScript: document.getElementById("tab1").onclick = function(){ this.href += "#tab-1"; } I have the following array that contain the people who are on off on certain time: Code: var all = [
["1234", "Jim", "2011-10-23 00:00:00", "2011-10-25 07:00:00"],
["1235", "Jack", "2011-10-21 00:00:00", "2011-10-21 08:00:00"],
["1236", "Jane", "2011-10-11 00:00:00", "2011-10-11 00:30:00"],
["1237", "June", "2011-10-20 00:00:00", "2011-10-20 12:00:00"],
["1238", "Jill", "2011-10-14 00:00:00", "2011-10-14 11:00:00"],
["1239", "John", "2011-10-16 00:00:00", "2011-10-16 10:30:00"],
["1240", "Jacab", "2011-10-19 00:00:00", "2011-10-20 08:30:00"]
];
The above array, I wish to use javascript to insert into the FullCalendar (http://arshaw.com/fullcalendar/). I notice that the only way seems to be using the FullCalendar array style (or structure) as follows: Code: $('#calendar').fullCalendar({
events: [
{
title : 'event1',
start : '2010-01-01'
},
{
title : 'event2',
start : '2010-01-05',
end : '2010-01-07'
},
{
title : 'event3',
start : '2010-01-09 12:30:00',
allDay : false // will make the time show
}
]
});
So, the question is: How do I insert my array to match with the FullCalendar array? cause FullCalendar array had a different array structure from my array - and I don't think so that I can write in this way: Code: $('#calendar').fullCalendar({
events:all
});
Appreciate any help provided. Hey guys, I'm hoping this is possible or that there is an easier way to do this. I'm having an issue with displaying data from one array that contains information about users in a table that is controlled by a different array. Is it possible to do this or is this use of arrays to display the data the wrong approach? The table is located on one webpage, I simply want to extract one piece of information that I have placed in the initial array as part of the login script that contains user information (for validation for login etc) and display it in a table on the new webpage that is opened as a result of successful validation of the user details. I'm completely stumped and after many attempts I just can't seem to get it to work. I can't seem to figure out how to accomplish this. In my website, I would like the user to input text into a single or multiple textbox(es) and then have the contents of the textbox(es) stored to either a variable or an array. Then I would like to have that variable/array compared to other arrays. Basically, the user is searching for items in a database. The user can search for as many or as little items as they want. Then the item(s) will be compared to multiple arrays to find out if what the user wants is in the database. So for example, let's say the user is searching for recipes that have all or part of these ingredients: chicken, broccoli, lemon, honey. So, there would have been a total of 4 textboxes...one for each ingredient. These ingredients are stored to an array..lets call it ingredient(). In the database of recipes, each recipe has its own array which includes the ingredients needed to make the recipe, we'll call them tag1(), tag2(), and tag3(). Now, I want the array, ingredient(), to be compared to each of the "tag" arrays to see if any of the "tag" arrays include exactly match the ingredient() tag in part or in whole. Is this possible? Hello guys, I've problem with connected database to textbox the value doesn't change. I tried with dropdownlist ,still the same problem. what's the best tool for it. var TextBox3 = document.getElementById("<%=TextBox3.ClientID %>"); var x = TextBox3.value; <asp:TextBox ID="TextBox3" runat="server" DataSourceID="SqlDataSource5" DataTextField="status" DataValueField="status"> </asp:TextBox> <asp:SqlDataSource ID="SqlDataSource5" runat="server" ConnectionString="<%$ ConnectionStrings:RFIDConnectionString %>" SelectCommand="SELECT status from reader where reader_id=2"></asp:SqlDataSource> Thank you |
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