JavaScript - Accessing Html By Name At Runtime

Hi,
I've written a small script for a website, and strangely enough (or maybe not) it works in Firefox and Chrome but not IE.
I'd read about block level inside inline causing this but i'm still not entirely sure. Here is the offending script:

Code:

function changeImage(image) {
 if (image == 6) {
  var vid = document.createElement('object');
  vid.width = "700";
  vid.height = "370";
  vid.id = "photo";
  vid.innerHTML = '<param name="movie" value="http://www.youtube-nocookie.com/v/g4cpDgGlFng&hl=en_US&fs=1&rel=0"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube-nocookie.com/v/g4cpDgGlFng&hl=en_US&fs=1&rel=0" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="700" height="370"></embed>';
  document.getElementById("body").replaceChild(vid, document.getElementById("photo"));
 } else {
  var img = document.createElement('img');
  var old = document.getElementById("photo")
  img.width = "700";
  img.height = "370";
  img.id = "photo";
  img.alt = "Photo of Gippsland Lakehous";
  img.src = "images/photos/" + image + ".jpg";
  document.getElementById("body").replaceChild(img, old);
 }

The offending line is the long innerHTML one. I'm sure this must be a very hacky way of doing things (incidentally the thing is replacing an image with another image or video depending on what is clicked), but I rarely code at all, so don't know any better

Thanks!

Hello,

I have a multi-dimensional object, derived from JSON returned by the Foursquare API. The object has the following structure (as printed using a print_r type method from http://www.openjs.com/scripts/others...hp_print_r.php

PHP Code:
    '0' 
        'id' => "27110xxx"
        'created' => "Sun, 11 Apr 10 15:09:45 +0000"
        'timezone' => "America/New_York"
        'user' ...
            'id' => "48xxx"
            'firstname' => "Barry"
            'lastname' => "xxx"
            'photo' => "http://playfoursquare.s3.amazonaws.com/userpix_thumbs/4abb5bxxxxxx.jpg"
            'gender' => "male"
        'display' => "xxxx. @ [off the grid]"
    '1' ...
        'id' => "2538xxxx"
        'created' => "Wed, 07 Apr 10 13:24:41 +0000"
        'timezone' => "Europe/London" 


Could anyone tell me the best way to access its elements? I have this so far which gets the required values, but I want to preserve the order ie. get the data from the first element in the object first, then move to the next - each element represents a user so I want to keep their data separate.

PHP Code:
/* This is a custom function which has the same function as print_r */
    function dump(arr,level) {
        
        var firstName, lastname, geolat, geolong, photo;
        
        var dumped_text = "";
        if(!level) level = 0;
        
        //The padding given at the beginning of the line.
        var level_padding = " ";
        for(var j = 0; j < level + 1; j++) level_padding += "    ";
        
        if(typeof(arr) == 'object') { //Array/Hashes/Objects 
            for(var item in arr) {
                var value = arr[item];
                
                if(typeof(value) == 'object') { //If it is an array,
                    dumped_text += level_padding + "'" + item + "'\n";
                    dumped_text += dump(value,level + 1);
                } else {
                    dumped_text += level_padding + "'" + item + "' => \"" + value + "\"\n";
                }
                
                if (item == 'firstname')   {
                    firstname = value;
                    document.write("First name: " + firstname + "<br />");
                    document.write(item);
                }
                
                if (item == 'lastname')   {
                    lastname = value;
                    document.write("Last name: " + lastname + "<br />");
                    document.write(item);
                }
                
                if (item == 'geolat') {
                    geolat = value;
                    document.write("Latitude: " + geolat + "<br />");
                    document.write(item);
                }
                
                if (item == 'geolong')  {
                    geolong = value;
                    document.write("Longitude: " + geolong + "<br />");
                    document.write(item);
                }
            }
        } else { //Stings/Chars/Numbers etc.
            dumped_text = "===>"+arr+"<===("+typeof(arr)+")";
        }
        return dumped_text;
    }
    
    var myObj = <?php echo json_encode($checkin); ?>;
    
    alert(dump(myObj));

Sorry for the bloated code, I normally work in Java and PHP so although I understand the theory, I haven't worked with objects much in JavaScript before. Any help would be much appreciated!

hy all, I am creating an accordion menu that when i press the " UNIT " tab, it opens up a list of " Chapters " tab, and when i press on any one of those chapters, a list of lessons opens up. Till now, i have managed to create all the appropriate lists, but in default, lessons and chapters are opened automatically, and the lessons elements when pressed do not scroll back up to the chapters parents. My html5 file:
Code:

<script type="text/javascript" src="jqueryjs.js"></script>
<script type="text/javascript" src="jqueryuiaccor.js"></script>
<script type="text/javascript">
    $(document).ready(function() {
        $('#accordion').accordion();
    });
</script>

<div id="container">
<div id="content">
<div id="sidebar">
        <ul id="accordion">
            <li>
                <a href="#recent" class="heading">Unit 1</a>    
                    <ul id="accordion">             
                        <li> <a href="#recent" class="heading">Chapter 1 </a> </li>
                                <ul id="accordion2">
                                    <li> Lesson 1 </li>
                                </ul>
                    </ul>
                    </li>
                    <li>
                    <a href="#recent" class="heading">Unit 2</a>    

                    <ul id="accordion">             
                        <li> <a href="#recent" class="heading">Chapter 1 </a> </li>
                                <ul id="accordion">
                                    <li> <a href="#recent" class="heading" role="tab" aria-expanded="true">Chapter 2 </a>
                                        <ul id="accordion">
                                            <li> <a href="#recent" class="heading">Lesson 1 </a></li>
                                        </ul>
                                    </li>
                                </ul>
                    </ul>
            </li>
        </ul>       
    </div>
    </div>
</div>

My acorjs.js file:

Code:

$(document).ready(function() {
    $('ul#accordion a.heading').click(function() {
        $(this).css('outline','none');
        if($(this).parent().hasClass('current')) {
            $(this).siblings('ul').slideUp('slow',function() {
                $(this).parent().removeClass('current');
                $.scrollTo('#accordion',1000);

            });
        } else {
            $('ul#accordion li.current ul').slideUp('slow',function() {
                $(this).parent().removeClass('current');
            });
            $(this).siblings('ul').slideToggle('slow',function() {
                $(this).parent().toggleClass('current');
            });
            $.scrollTo('#accordion',1000);

        }
        return false;

    });

});

Please HELP!

i have this code:
PHP Code:
<?php
foreach ($freechat_list as $r)
{
     $uniqueCode = substr($r,0,12);
     $id = substr($r,13);
     $blocked_record = RcBlockListTablePeer::isBlocked($id,$requestor_id);
     ?>                                 
     <a href="#" id="profilelink" name="profilelink"  onClick="return viewornot(<?php echo $id."/".$blocked_record; ?>)"><?php echo $uniqueCode; ?></a>
}

then i have my JS:
[CODE]
thank you all but i am totally confused now...here is my full code:
<?php
foreach ($freechat_list as $r)
{
$uniqueCode = substr($r,0,12);
$id = substr($r,13);
$blocked_record = RcBlockListTablePeer::isBlocked($id,$requestor_id);
?>
<a href="#" id="profilelink" name="profilelink" onClick="return viewornot(<?php echo $id."/".$blocked_record; ?>)"><?php echo $uniqueCode; ?></a>
}
my JS:
Code:

    function viewornot(id)
    {
       alert(id);
    }

alert(id) only gives me the id but in my href i concatenated it with blocked_record: viewornot(<?php echo $id."/".$blocked_record; ?>)

please help?

Hello,

I am working on a project using HTML and javascript to allow the user to choose a vehicle from a drop down menu, then load a new page showing some information about this vehicle. The information is stored in an Excel file. I posted regarding this issue a while back and got an excellent response from Old Pedant (thanks again!) about using ActiveX - which has thus far worked perfectly. My initial condition was that I would only be using IE7+. However, my next idea was to be able to use it on an IPad (which I unfortunately do not own yet, making any kind of testing difficult) which I am fairly certain ActiveX won't work on. So, I was looking for any other method which would be similar.

Important note: this will not use the internet at all, all of these files will be available locally. There is a lot of material on running queries to servers, but I didn't think that would really apply here. It seems pretty clear that JS has difficulty accessing files client side (which I understand why completely), but I was hoping to find something that worked for the gray zone I'm currently working in since I'm not using servers at all.

I know that this is not really the intended use of HTML/JS, but I was hoping that by writing it as an HTML file, it'd be accessible to anyone with a browser. Some of my target computers have odd limitations (such as not being to download .exe files).

The code I based my original off of is shown below:

Code:

<script type="text/javascript">

var conn = new ActiveXObject("ADODB.Connection")
conn.Open ( 'Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\full\path\to\MyExcel.xls;Extended Properties="Excel 8.0;HDR=Yes;IMEX=1";)';

var sql = "SELECT * FROM [nameOfSheet$]";
var rs = conn.execute( sql )
while ( ! rs.eof ) 
{
    // just an example of dumping everything from the sheet out to the browser:
    for ( var f = 0; f < rs.fields.count; ++f )
    {
        document.write( rs.fields(f).value + "," );
    }
    document.write("<br>\n");
    rs.moveNext();
}

rs.close();
conn.close();
</script><script type="text/javascript">

var conn = new ActiveXObject("ADODB.Connection")
conn.Open ( 'Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\full\path\to\MyExcel.xls;Extended Properties="Excel 8.0;HDR=Yes;IMEX=1";)';

var sql = "SELECT * FROM [nameOfSheet$]";
var rs = conn.execute( sql )
while ( ! rs.eof ) 
{
    // just an example of dumping everything from the sheet out to the browser:
    for ( var f = 0; f < rs.fields.count; ++f )
    {
        document.write( rs.fields(f).value + "," );
    }
    document.write("<br>\n");
    rs.moveNext();
}

rs.close();
conn.close();
</script>

Thank you,
klarosa

Hey

is it possible to access javascript variables in an iframe src page from the parent page, or vice versa. How do you do this? What about the DOM?

thanks

Hello, I have a simple form with simple validation. I am just playing around a bit with forms and don't really have concrete knowledge.

What I have done is created a form. Asking for first name, last name, age and email. When the user clicks the submit button I want 2 functions to run, the first checking the input is correct and also making sure all fields have a value.

Once everything is checked and is O.K I want to go into another function which sends all this information to an array one by one. I am having difficulty accessing each individual input tag. I could achieve what I want to do, but it will take double the lines of code because each input has a different 'name'. So, what I am trying to do is access the input tags the same as you would do an array. Here is my code:

HTML:
Code:

<form name="regForm" id="form">
	 <fieldset>
		 <legend>Real Heroes - Registration Form</legend>
	
	 <p>First Name:<input type="text" size="30" maxlength="20" name="txtFirstName" /></p>
	 <p>Last Name:<input type="text" size="30" maxlength="20" name="txtLastName" /></p>
	 <p>Age:<input type="text" size="30" maxlength="3" name="txtAge" /></p>
	 <p>Email Address:<input type="text" size="30" maxlength="50" name="email" /></p>

	 <p><input type="button" value="Submit Registration" name="butChkForm" onclick="callFuncs_onclick()" />
		<input type="reset" value="Reset" name="resetForm" /></p>
</fieldset>
</form>

JavaScript:
Code:

//CALLING THE FORM SCRIPTS//
function callFuncs_onclick()
{
	 chkForm_onclick();
	 creatingDatabase_onclick();
}


//**************FORM VALIDATION***************//

function chkForm_onclick()
{
	 var theForm = document.regForm;
	 if (theForm.txtFirstName.value == "" || theForm.txtLastName.value == "" || theForm.txtAge.value == "" 
		 || theForm.email.value == "")
	 {
		 alert("Please complete all of the form.");
		 if (theForm.txtFirstName.value == "")
		 {
			 theForm.txtFirstName.focus();
		 }
		 if (theForm.txtLastName.value == "")
		 {
			 theForm.txtLastName.focus();
		 }
		 if (theForm.txtAge.value == "")
		 {
			 theForm.txtAge.focus();
		 }
		 if (theForm.email.value == "")
		 {
			 theForm.email.focus();
		 }
	 }
	 else if (isNaN(theForm.txtAge.value))
	 {
		 alert("That is not valid input for this field. Please re-enter your age.");
		 theForm.txtAge.focus();
	 }
	 
	 else
	 {
	 alert("Thank you for completing the form, " + theForm.txtFirstName.value);
	 }
}

function creatingDatabase_onclick()
{
	 var form = document.regForm;
	 var index = form.input[0].value;
	 alert(index);
}

I'm not quite sure where I am going wrong. Please note that these functions really labour the point, I know I have way too many lines of code but I am still very amateur with JS.

Thank you for any help/information.

Kind Regards,

LC.

i m trying to extract data from an xml file and display data on Google maps
but when i try to run my code

In IE - Access denied error is display (while accessing the xml file)
Mozilla - code is working fine but displays following error -
Error: xmlDoc.getElementsByTagName("lat")[1] is undefined
Source File: file:///I:/BE%20Project%20Data/coding/Myexample/exam2.html
Line: 48

HTML file-

<html>
<head>
<title>Google Maps JavaScript API v3 Example: Fusion Tables Layer</title>
<link href="http://code.google.com/apis/maps/documentation/javascript/examples/default.css" rel="stylesheet" type="text/css" />
<style type="text/css">
html { height: 100% }
body { height: 100%; margin: 0px; padding: 0px }
#map_canvas { height: 500px;width: 800px }
</style>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
function initialize()
{
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.open("GET","agridata.xml",false);
xmlhttp.send();
xmlDoc=xmlhttp.responseXML;
var latlng = new google.maps.LatLng(48.75028,-94.91667);
var mapOpts = {
zoom: 5,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP,
};
var map = new google.maps.Map(document.getElementById("map_canvas"),mapOpts);

var l1=xmlDoc.getElementsByTagName("lat")[1].childNodes[0].nodeValue;
var l2=xmlDoc.getElementsByTagName("lng")[1].childNodes[0].nodeValue;

var pt = new google.maps.LatLng(parseFloat(l1), parseFloat(l2));
var marker = new google.maps.Marker({
position: pt,
map: map,
title: 'Just a simple marker'});
}
</script>
</head>
<body onload="initialize();">
<h1>output</h1>
<div id="map_canvas"></div>
</body>
</html>


XML file -
<?xml version="1.0"?>

<markers>

<marker>
<lat>52.09667</lat>
<lng>-173.50056</lng>
<state>Alaska</state>
<county>Aleutian</county>
</marker>

<marker>
<lat>48.75028</lat>
<lng>-94.91667</lng>
<state>Minnesota</state>
<county>Lake of woods</county>
</marker>


<marker>
<lat>52.09667</lat>
<lng>-173.50056</lng>
<state>Washington</state>
<county>Stevans</county>
</marker>

</markers>


do let me know the reason behind the undefined error and ACCESS DENIED error ... i have tried modification in the security setting of the browser but error is not solved yet ...

thks

I'm trying to accessing the Parent window fom a sub window previously opened using window.open

I'm using firebug to t yand debug, and it shows that this DOM entry exists..
window.opener.location.href
But trying to access it gives "window opener is null" error



I've tried all these, and get the various errors tagged on the end...

Code:

<script language="JavaScript">
//alert(opener.location); // =  opener is null
//alert(opener.location.href); // =  opener is null
//alert(parent.location); // = uncaught exeption - could not convert to javascript argument arg 0
//alert(parent.location.href); // = Permission denied to get property Location.href
//alert(parent.opener.location); // = uncaught exeption - could not convert to javascript argument arg 0
//alert(parent.opener.location.href); // = Permission denied to get property Location.href
//alert(parent.window.opener.location.href); // = Permission denied to get property Location.href
//alert(parent.window.opener.location.href); // = Permission denied to get property Location.href
//alert(window.opener.location); // = window opener is null
//alert(window.opener.location.href); // = window opener is null
//alert(window.parent.location); // = uncaught exeption - could not convert to javascript argument arg 0
</script>

driving me crazy! Anyone have a solution?

I have developped a script in order to resize the height of a div on a web page in order to display it at least up to the size of the window. Here is the code:

function resize(){
var frame = document.getElementById("content");
var padding_top = parseInt(window.getComputedStyle(frame,null).getPropertyValue("padding-top"));
var padding_bottom = parseInt(window.getComputedStyle(frame,null).getPropertyValue("padding-bottom"));
var padding = padding_top + padding_bottom;
var bodyheight = document.body.scrollHeight;
var windowheight = window.innerHeight;
if (bodyheight < windowheight){
frame.style.height = windowheight - padding + "px";
}
}

It works well, but I was wondering why I am not able to get the padding-top and -bottom using these two instructions:

var padding_top = frame.style.paddingTop;
var padding_bottom = frame.style.paddingBottom;

The script runs but Firebug shows empty strings for both values. How come? Is there a bug in Firefox?

Thanks inadvance for your time and help.

I've read through the past threads and did not find anything that quite
matched my problem, which surprises me because I thought it would be
fairly common.

Anyway, I have a script where I define an array and populate the array.
In the same script is a function that tries to scan the table looking for
a match with the value in a global primitive.

In the HTML, a button click invokes the function. But while the function
can correctly access the global primitive, it simply stops running when
it encounters the reference to the global array.

Here's a shortened, simplified snippet of the code:

[code]

<script type="text/javascript">

var len = 2;
var course_code = new Array();
course_code[0] = "A010";
course_code[1] = "A500";

function runcodes()
{ alert('In runcodes');
alert('len = '+len);
alert('course_code.length = '+course_code.length);
for (i = 0 ; i < course_code.length ; i++)
{alert(course_code '+i+' = '+course_code[i]);}
}

</script>

<body>
<button type="button" name="runc" id="runc" onclick="runcodes()"; >
Click to display course codes table.
</button>

</body>
[ICODE]


When I bring this up in a browser and click the button, I get the
following alerts:

In runcodes
len = 2

and then the script simply stops. So it stops on the first reference
to the array. Clearly I am getting to function, and the function is
able to handle the global primitive 'len', but it stops on encountering
the global array.

I've tried a lot of variations on the the theme, but nothing gets past
this restriction. How do I access elements in a global array from inside
a function?

I created an array, whose entries looks like this:

[41, "The bird flew into it's cage"]
[33, "He drew fire from Joe"]
[33, "Roger asked her her name"]
[2, "I am awfully happy"] .

I want to pull the sentence item
out of some array entries.
E.g., in the second entry,
namely, arrayName[1],
what I thought was the
second item (the sentence),
I could manage by invoking
arrayName[1][1] .

But to my dismay,
this doesn't do the trick.
arrayName[1][1] actually delivers up
the second CHARACTER of the
entry (the number "3").

I thought the comma between
the number and the sentence would
separate the items, although I
"pushed" each entry into the array
as one single entry.

How do I "grab" the whole sentence?
How do I push both items separately
to achieve "one entry"?

I have many examples within my page of the form:
Code:

<a id="L1" href="#" onclick="return showSpan();" onblur="return hideSpan();"><span> ... </span></a>

The page is styled so that hovering over the link displays the contents of the hidden <span> as a block without any javascript. I want this to work (that is display the span as a block) when the user tabs onto a link (and presses Return/Enter). When the user tabs away, it should hide the <span>.

My starting code looks like:
Code:

function showSpan() {
  var linkID = document.getElementById(this.id);
  var classList = linkID.getElementsByTagName('span');
  var divID = classList[0];
      divID.style.display = "block";
      return false;
} // function

with a similar function for hideSpan(),

Ultimately I would like to add these event handlers in the initialisation phase, which is why I have used a parameterless function.

Whenever I try this, I get an error that this.id does not exist.

How can I attach these event handlers?

John Rostron

Hi All,

Am new to Javascript but fluent in C++ and other languages, I have a query, i made a global variable to hold string information, can the value of this string be assigned to a form input field value?

I mean in the 'default value sense' I am just wondering if there is any syntax to accomplish this.

EG in my javascript i have the string nameVal; It is a global variable, i would like to know if it is poosible access its value for use in the line below shown with italics, or is it basically always a case of 'type the value in manually yourself' and then rely on events functions to update the field thereafter?

Code:

Name: <br><input type = "text" name = "nameField" size = "50" value = my string val here onChange ="this.value=storeVal(this.value, '0')"></input></br>

So I'm pretty much new to JS, and I'm trying to write something, and I'm having a problem.

It's a color picker. So I have an object that defines the default color, and then when the color is updated, the different css classes need to be updated as well.

So here's what I was trying to do

Code:

var colorPicker = {

  mainColor: "red",

  backgroundColor: this.mainColor + "bkgd",

}

So problem 1 is I keep getting "undefined" returned for "this.mainColor". If I use colorPicker.mainColor, it hasn't been created yet so it throws an error.

Problem two is if I update mainColor from another function, say to make mainColor = "green", then backgroundColor doesn't automatically update.

Any help is appreciated.

Thanks