Accessing Form Element Properties Using Onchange?
Jul 5, 2006
I have 1 form, and dozens of elements. In the select elements I use onchange="somefunc()". In this function I'd like to access and change the form element attributes (such as form.element.option[].value and form.element.option[].innerHTML).
Is there a way to access the element that has just changed (unsing onchange="somefunc()") by passing a "this.element" parameter to access the elements properties such as form.element.option[].value within the function?
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Mar 21, 2010
I am dynamically building a part of my HTML page by setting the innerHTML of a DIV element. Immediately after I do that I try to retrieve the clientHeight and clientWidth of the DIV element in order to determine what height and width the element actually ended up being. But I always get 0 as both the height and width. The contents of the DIV, i.e. the HTML code that I inserted into it via the innerHTML, does indeed get displayed on the page. But I suspect that the browser doesn't actually update the page until AFTER my JavaScript code has completed and "returns control" to the browser.
Does that make sense? Is there any way I can force the browser to update the page BEFORE my code completes its processing, so that I can properly retrieve the width and height of the element I just inserted into the page?
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Jan 25, 2010
I have an object on the document element that allows for other components to register with it, i have a custom event something along$(document).bind("register",function(thechild)..So in the child object when they are created i call$(document).trigger("register",this);And indeed i get the DOM object. However i'm looking for the plug in object, i want to be able to call methods on the passed childobject and access it's Config.Does that make sense? How can i write a plug in that is applied to various objects that also registers itself with an 'overseer' object on the document element in such a way that i can allow that overseer object to call methods on any registered child objects?
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Aug 1, 2011
Code:
oText = oForm.elements["text_element_name"]; OR
oText = oForm.elements[index];
[code]....
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Aug 10, 2009
i am creating text box Elements using DOM if only user needs it by using Create Element
var element = document.createElement("input");
element.setAttribute("type", "Textbox");
element.setAttribute("name", "group[]");
newdiv.appendChild(element);
[Code]...
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Jul 23, 2005
I'm building a website that needs to be able to check the value of an
element and give it a new value based on what it's current value is.
So for example, if I had a product and my code read like this...
<input type="text" name="name" size="20"><br>
<input type="text" name="description" size="20"><br>
<select size="1" name="public">
<option value="1">on</option>
<option value="0">off</option>
</select>
Assuming the name of my form was "form", I could access the value of the
text fields by "window.document.form.FIELDNAME.value" and the select by
"window.document.form.public.selectedIndex". But the page i'm working with
has multiple products listed and so I've addopted a nming convention for the
elements name's so that I could access it more efficiently in PHP. So for
example, I'd have multiple products as such Code:
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Mar 31, 2011
I am fairly familiar with the concept of Objects and their properties and methods, but javascript being object based as opposed to object oriented has me stumped on how to access an object's properties from an onclick event handler created for another object created within the original object.In the example below, I have a constructor function called anyObj. to which I pass an object reference to an element.
anyObj has 3 properties and one function increaseWidth()
increaseWidth() creates a new button with an onclick event handler and this is where I have a problem.The onclick function needs to increase the value of anyObj's this.width property. I originally had a line this.width += 10; in the onclick but quickly realised why this wasn't working because the this in the onclick function refers to the new button object and not the this.width property of anyObj.
The workaround I have used, and it works, is to make a copy of all the this.xxxxx properties. eg. width = this.width; and use the width variable in the onclick as you can see below. This "workaround" works fine but doesn't feel ideal to me.So, what I am asking advice on is, is there a better way to access the anyObj()'s properties from within the onclick function than the way I have done it? Obviously I would prefer to not have to make copies of all the anyObj() properties like I have to make them accessible to the onclick function.
Code:
function anyObj(divObj){
this.elem = divObj;
this.width = 50;
[code]....
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Aug 6, 2010
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:
It works well, but I was wondering why I am not able to get the padding-top and -bottom using these two instructions:
The script runs but Firebug shows empty strings for both values. How come? Is there a bug in Firefox?
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Feb 10, 2010
Can I target the element and base an onChange outside of directly calling it in the element tag?
Due to the nature of my script, the best I can do is wrap a tag around the element.
example of what I am trying to do
Code:
<script>
document.form.field1.onchange = function();
<script>
And if this might work, can I call it in the head or must it come after the element.
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Apr 15, 2006
I only get an error telling me "test has no properties"...
Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<script language="javascript" type="text/javascript">
var test = document.getElementById("test");
var title = test.getAttribute("title");
alert(title);
</script>
</head>
<body>
<p id="test" title="test title">This is a test</p>
</body>
</html>
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Jun 21, 2009
I am working on a little javascript project, and I need to get an arbitrary element's style information.
For instance, I want a method that you can pass a reference to an object, and for instance, find the current css height property that applies to it, no matter where it was declared. I don't mind it returning a null value if it wasn't set anywhere, but if it's coming from some css class or some css id or some locally defined style, I want to know what is being expressed.
If I just try el.style.height, it only lets you know what the height is if it was explicitly defined in the style tag.
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Aug 17, 2010
semi-misleading title, but i just didn't know a better way to explain my problem.Given the object:
Code:
// js object
var object = {
[code]....
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Nov 23, 2005
Maybe a stupid question (I'm not so familiar with javascript), but:
I want to change background of a paragraph or list item on mouseover. The
following code works:
<p onMouseover="this.style.backgroundColor='yellow'"
onMouseout="this.style.backgroundColor='white'">ppppp</p>
Now I want to minimize the coding bij using a function. How do I do that?
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Feb 10, 2011
I have a billion elements that all share the same class. I have another billion elements that all share another class. This cannot be changed. My objective is to use one element to trigger onclick a change in the others elements' css properties, that is each element is paired with another, producing a billion unique pairs. From hours of deciphering the cryptic documentation examples ive come up with the following, which doesnt work. Assume that im using "name=item#" in the element's tag to identify each pair.
One fundamental issue with this is that it will change the opacity of both elements in the pair were both elements to share a name,or it will only affect the element being clicked on if not, but i only want it to change the opacity of the element that isnt being clicked. Another issue is that there are instances where i may need to set a setTimeout on a css property, and ive not found any documentation on integrating javascript and jquery together within a function.So how do i get this function to accept input from one element and affect the css properties of the other? And what would a setTimeout look like if it were placed around the opacity property?
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Apr 14, 2010
How do I restore CSS properties for a selected element? I want to change the background-color of a particular item on click, then restore the original CSS bgcolor from the stylesheet when it's clicked a 2nd time.
The item in question has a CSS class applied to it from the stylesheet.
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Jun 3, 2010
On a page I display a link of search results which are hyperlinks, which all have the same URL get paramaters with different values (i.e. companyreport.aspx?....). I want to then click on a search result hyperlink and then generate a Div popup (this is called through a javascript call that is attached to each search result hyperlink's onClick property.
For the hyperlink that is clicked, I need to take its 'href' value and use it (reason for us is in a bit).
On the popped up Div element is a dropdown box and two buttons (accept / decline). Once the accept button is pressed, I want to then go to the page the selected hyperlink was pointing to by using the 'href' value I obtain from the clicked search hyperlink and to also append to this hyperlink the a new GET parameter and the value of the dropdown box.
I have got this to work currently but it seems quite mess, so was wondering if there is a better solution to this.
For the search results hyperlinks I have...
Code:
PromptRequestReason(this.href); return false;
this '' javascript method is....
Code:
function PromptRequestReason(hrefLocation)
{
lnkDERequestReason.href = hrefLocation;
popup('popUpDivReason');
}
then on the DIV popup I have the following link....
Code:
<a id="lnkDERequestReason" onclick="this.href = this.href + '&reason=' + document.getElementById('drpPortfolios').value">Select</a>
now this all works, but I really seem like I am taking the long way around when there could be something simple.
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May 25, 2011
I know the atomic way to set style properties of a DOM element like
Is there any way to set multiple properties in the same time? I'd like to spare some cpu time...
I assume if I use framework like JQuery to set more style props at once that call will be interpreted to the atomic way I described above...
Am I right with this guess?
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Jun 13, 2010
I'm trying to append an onChange attribute to an element created through javascript. The following doesn't work. The select is created and has the proper name and id but no onChange..
var sel = document.createElement('select');
sel.name = 'size[' + i + ']';
sel.id = 'size[' + i + ']';
sel.onchange = "changeMini();";
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Dec 20, 2011
I have a small HTML form that has a textfeild which when clicked on open a calender, this works fine. I also want to display the selected date in another textfeild using "OnChange". This is what I am working with:
TEXTFEILD
Code:
<input name="startDate" type="text" class="bodytext" id="startDate" size="10" maxlength="10" onclick='scwShow(this,this);' onchange="PrintValues3();" target="_parent._top" onmouseclick="this.focus()">
[code]....
The result2 is then displayed in a textfeild called "result2" but in my case its not.
Is it possible to use both "OnClick" and "Onchange" together?
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Apr 2, 2010
In a project repeated blocks are identified by an <input type="hidden" value="x" /> field. To get an access to one of the block I wanted first access to that field. My first problem is there and I will explain it by a micro-project (tested with Firefox only)
Here is the HTML code :
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "[URL]">
<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=utf8" />
<meta http-equiv="Content-Style-Type" content="text/css" />
<meta http-equiv="Content-Script-Type" content="text/javascript" />
<link rel="stylesheet" href = "index.css" type="text/css" />
<script type="text/javascript" src='Library/jquery-1.4.js'></script>
<script type="text/javascript" src='index.js'></script> .....
And here the javascript code wher is the JQuery question
//meta http-equiv content-type charset=utf8
function test(){
var $id = $('#curUnion').val();
var $objet = $('#toutesUnions > .pseudoFieldset').find('input[value=$id]');
var $test = $objet.val();
var $objet2 = $('#toutesUnions > .pseudoFieldset').find('input[value="1"]'); .....
With $id = "1" as shown by the Javascript debugger (in Firefox) where is the difference between find('input[value=$id]') and find('input[value="1"]')
Giving the alert result => undefined / 1
If you want to test the micro project you will find it in the Test.zip joined. How to access the immediate parent pseudoFieldset to get its html code?
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Dec 5, 2011
I am trying to access an element in a page using ID using jquery in when the document is ready.But the problem is the length is always 0 even if the script tag is in the head or right at the bottom of the page. The element is seen rendered when I see it using FireBug.an someone point out where I am making a mistake accessing the element
$(document).ready(function() {
alert('Hello World");
$('#id').live("click", function() {
[code]....
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Feb 2, 2011
I have been scratching my head on this one for a couple days:
Code:
function hideAll(){
var education = document.getElementById("education").childNodes;
[Code]....
As far as I know, this should be working the way I expect it to (set the display of all the childnodes to none), but I guess I'm missing something. Is it not possible to instantiate a variable using childNodes without choosing a specific index of the array? I just assumed it would work like any other array
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Feb 10, 2010
on the onchange event of a select element, i would like to pass the old selected value and the new selected value to a function.
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May 4, 2010
i have the following code
<script type="text/javaScript">
$(document).ready(function(){
$("#dropPrd").change(function() {
$('#imgAjaxLoading').ajaxStart(function(){
[Code].....
and i want to access the element dropSubPrd that is inserted on that ajax function, on the div FirstResult, but it will not work in $('document').ready because when the page load's that element isnt there.
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Apr 1, 2010
When retrieving JSON data I'm able to access individual elements using the $.each() function and iterate over them. However, how would I access just one element by its location and not by name? (i.e. data(0) not data.ID).
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Jun 23, 2011
<script type="text/javascript">
function insertPreference() {
var row = document.getElementById('voteTable').rows[0];[code]....
I can get the value for id and title. However, I can not get the radio button value.I will loop through the <tr> tag and access the <td> and pass it to AJAX module in (id + title + value) manner.Is there a way to do that?
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