Clarification Regarding ChildNodes Attribute
Aug 16, 2006
From what I've read, everything in the DOM is a node. Basically there are three types of nodes: text, element and attribute (there are more node types but these are the most common).
Let's say I have the following html:
<html>
<form>
<p></p>
</form
</html>
Then this javascript:
var forms = document.getElementsByTagName("form")
var form = forms[0];
alert(form.childNodes.length); /* output is 3 */
I would think that the output should be 2 as I only see 2 childNodes for the form object: the <p> element is an element node and the <p> element has a text node, so that's a total of 2 nodes. Where is the 3rd one comming from.
To add to the confusion, if I change the html to:
<html>
<form>
<p title="jeff" id="22"></p>
</form
</html>
The above javascript still outputs 3. I would think that the output is 4:
- 1st node is the <p> element
- 2nd node is the <p> element's attribute node "title"
- 3rd node is the <p> element's attribute node "id"
- 4th node is the <p> element's text node
Obviously I'm not correctly comprehending how childNodes are determined.
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Dec 26, 2006
i want to know that what is function()={function details etc. }
e.g. element.onmouseover=function(){this.className='myclass'return false}
what is the meaning of above. Some times when i put just element.onmouseover = function onclicking() does not work but above method works.
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Jul 20, 2005
This is a clarification of a previous message, which was not expressed
very well. I have a set of checkboxes near the bottom of the page and
a function that checks or unchecks all of them. But when the function
runs, the window scrolls to the top of the page.
How can I set my checkboxes but leave the window's scroll position
exactly where it is? Or at least have it scroll to the bottom (where
the checkboxes are).
I've tried using window.scrollTo(), but the window always scrolls to
the top no matter what. It's the same in Navigator and IE.
Here's my code:
function checkAll(whichForm, startIndex, endIndex)
{
for (var j = startIndex; j <= endIndex; j++)
{
document.forms[whichForm].elements[j].checked = true;
}
window.scrollTo(0, 1000);
}
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Jul 20, 2005
A and B can be anything, another words those elements are variable.
I need to transform:
<A> x <A>
<A> y <A>
<B> i <B>
<B> j <B>
<B> k <B>
into:
<A>
<P> x <P>
<P> y <P>
</A>
<B>
<P> i <P>
<P> j <P>
<P> k <P>
</B>
There seems no easy way to do that. Am I missing somethig? I tried using variables, but they cannot be reassigned within the same context.
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Dec 10, 2011
clarification on passing variables
[Code]...
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Oct 18, 2010
I'm working on hiding all of a page's content immediately via Javascript. I want to avoid using CSS to display none just incase I run into users who don't have JS enabled.
I wanted to get advice from others and see what the difference is between using jQuery actions within $(window) or $(document).ready. From what I understand, $(window).bind("load, function(){ etc. will only use the script once all contents on the page are loaded, including images?
And $(document).ready(function(), etc just requires the DOM to be ready but will still execute code even if images, etc. aren't loaded.
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Jul 11, 2006
this should be simple but I cannot figure it out. This is the HTML:
HTML Code:
<div id="box">
<p>one</p>
<p>two <strong>three</strong></p>
...
</div>
The JavaScript function has to take everything inside <div id="box"> and put it into another div. It should become:
HTML Code:
<div id="box">
<div class="content">
<p>one</p>
<p>two <strong>three</strong></p>
...
</div>
</div>
So how can I get all childNodes recursively to enclose them with another element?
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Jan 4, 2006
I have a problem with getting the amount of childs in a XML structure,
the strucure is somewhat like the following:
<?xml version="1.0" encoding="iso-8859-1"?>
<cms>
<num>21</num>
<xmlnames>
<field>id</field>
<field>name</field>
<field>availablefrom</field>
<field>availableuntill</field>
<field>owner</field>
</xmlnames>
</cms>
If I use the following to get te amount of childs for xmlnames I get an
amount of 11:
xmlObj.responseXML.getElementsByTagName('xmlnames' )[0].childNodes.length
Is this wrong or maybe there is a better / other way of counting the
child amount?
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Jan 7, 2007
I am starting to learn using javascript on DOM. One of the first things
I tested was listing all the child nodes from an element. Like ->
*html code:
<div id="pagetitle">
<span>My Text</span>
</div>
In my javascript I tried to list all the child nodes from <div>, Firefox
and Opera gave me 3 -- 1)text node with a null value, 2)span, 3)text
node with a null value.
It look to me that the browsers treated the line break as a text node
with no value!!
If I modified the html code to :
<div id="pagetitle"><span>My Text</span></div>
Then the browsers gave me the right answer: 1
They still gave me a wrong answer of 3 if I put a space around the
<spanelement like this:
<div id="pagetitle"<span>My Text</span</div>
What did I do wrong? I would still want the elements to be on their own
lines.
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Dec 26, 2003
i wrote a very simple HTML page to test some DOM features between Mozilla and IE. Mozilla is perfect everything went fine and i got the childNodes from my custom tag ( this tag i named <blah> ), inside this tag there is two <span>, that i retrieved. But with IE i really could figure out how its done! Code:
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May 20, 2005
I wanna get all the text nodes of the children of an element. The goal is to get an array with all the textNodes in each cell of a table, without any other nodes that might ocure whithin that cell (<p>, <br> etc...)
I mean if:
<td>12</td>
<td>1<p>23<b>34</b>5</p>6</td>
I need:
var txt = new Array()
txt[0] = ཈'
txt[1] = ?'
Now I had to circle through all the childNodes to extract all the text nodes. I have build a function, but something is wrong in the code, and I don't sense what. I need soime fresh eyes, any ideeas? Where's the mistake?:
<script type="text/javascript">
function checkCell(){
var allC = document.getElementById('tab').getElementsByTagName('td');//cells' collection
var txt = new Array()
for(var i=0;i<allC.length;i++){
txt[i]=''
while(allC[i].hasChildNodes()){
var chC = allC[i].childNodes;
for(var j=0;j<chC.length;j++){
if(chC[j].nodeType==3){
txt[i]+=chC[j].data;
}
}
allC[i]=allC[i].childNodes;
}
}
alert(txt[1])
}
onload=checkCell;
</script>
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Mar 14, 2006
I have a script that automatically makes the class change for an input field onFocus. Everything works in both IE and Firefox with the inputs, but I am having trouble with an image inside of a link in Firefox. I am using a link instead of a input type="submit" for IE reasons. Code:
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Jul 19, 2005
if I have:
<form id='form1'>
<input id='one' value=''>
<input id='two' value=''>
</form>
is there a way for me to check the child nodes of the <form> element for a specific id. in other words, can I check if form1 contains an element with id 'one' for example?
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Nov 23, 2005
I have a div 'readroot' that I clone. I change the change the id and
name of the childnodes of 'readroot' to the original name plus a
number(counter).
The problem is I have i have a div 'serials' inside 'readroot' and the
childnodes of 'readroot' are not modified with the current function i have.
What is the best way to modify the childnodes of the div serials?
I guess i could put another for loop inside the for loop of the
moreFields function but i am thinking a recursive function could do it. Code:
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Nov 11, 2010
I have a javascript for a tree view but i need to change it according to the requirement. Lets start with example with the treeview as follow:
1 Door phone
1.1 Ready Kits
1.1.1 Audioset
1.1.2 Videoset
[Code]....
Now the thing is in the current treeview a single category is open at a time. like if 1.1.1 is open 1.1.2 will b closed and similarly if 1.1 is open...1.2 will b closed. But i want that when i click on 1(Door phone) ie Door phone...evry node should be opened instead of just one similary when i click on 2(CCTV), all its node should be opened.
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Sep 21, 2006
I want to count the number of childnodes, when i run this script in mozilla i get a different total for the number of childnodes from numkids then when the script runs in IE. Why is this? How Can I get the same number. I want to loop though an objects child elements setting them to invisible or visible
<script type="text/javascript"><!--
function rec(n) {
var kids = n.childNodes;
var numkids = kids.length;
for(var i = numkids-1; i>=0; i--)
{
// sets child to hidden
alert(numkids);
alert(kids[i].nodeValue);
//kids[i].style.visibility = 'hidden'
}}
var a = document.getElementById('commentholder0');
// this function loops though the parts and makes then invisiable so you cant see them overlap
rec(a);
</script>
My html is here:
<ul id= "commentholder0" >
<li id="comment1">this is a test</li>
<li id="comment2">this 2 is a test</li>
</ul>
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Jan 11, 2011
I need to find the length of the childNode "city" to a particular "region" in the below XML.
<?xml version="1.0" encoding="ISO-8859-1" ?>
<Country Name="Singapore">
<Region Name="East">
<City Name="Pune">
<Dealer Name="XYZ" Type="A" Contact="9890455555" PinCode="123456"/>
<Dealer Name="ABC" Type="B" Contact="9890433333" PinCode="654321"/>
<Dealer Name="DEF" Type="A" Contact="9890422222" PinCode="867901"/>
</City>
<City Name="Mumbai">
<Dealer Name="dealer1" Type="A" Contact="9890455555" PinCode="123456"/>
<Dealer Name="dealer2" Type="B" Contact="9890433333" PinCode="654321"/>
<Dealer Name="dealer3" Type="A" Contact="9890422222" PinCode="867901"/>
</City></Region>
<Region Name="North">
<City Name="Delhi">
<Dealer Name="XYZ" Type="A" Contact="9890455555" PinCode="123456"/>
<Dealer Name="ABC" Type="B" Contact="9890433333" PinCode="654321"/>
<Dealer Name="DEF" Type="A" Contact="9890422222" PinCode="867901"/>
</City>
<City Name="Jammu">
<Dealer Name="dealer1" Type="A" Contact="9890455555" PinCode="123456"/>
<Dealer Name="dealer2" Type="B" Contact="9890433333" PinCode="654321"/>
<Dealer Name="dealer3" Type="A" Contact="9890422222" PinCode="867901"/>
</City></Region></Country>
Example the Region is East it has 2 cities below. I need to get this length using JS.
I tried doing x=xmlDoc.getElementsByTagName("City").length;
But it counts all the city elements present i.e. it returns 4. How to get the length of the "City" element particular to a "Region" element.
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Jul 23, 2005
i'm working on a portion of a CMS that allows content-admins to browse
a product list, and add individual products into the taxonomy by
clicking checkboxes next to categories they might belong in.
since the taxonomy is a rather long list, i'm hiding and showing divs
for the secondary and tertiary links, so when a user clicks on the
checkbox for the parent category, the children appear in a second (and
third) div, with checkboxes of their own.
however, i'd like for the secondary and third level checkboxes to
become unchecked when the parent is. i've tried addressing them in
numerous ways, but something consistently gets lost, in that i keep
getting "x doesn't have any properties" errors.
ie:
var parentnode = document.getElementById(divName);
var allMyChildren = parentnode.childNodes.getElementsByName("INPUT");
alert(allMyChildren.length);
this returns the proper length, but then
for (var i=0;i < allMyChildren.length;i++) {
var chklist = allMyChildren[i];
if (chklist.type == "checkbox") {
// uncheck it
}
}
this consistently returns that chklist has no properties...
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May 15, 2010
Is there a way to calculate the .offsetLeft or .left of a character in a string relative the element that contains the string? I'm just trying to wrap each character in an element and position the characters independently, so I have to set the .position to absolute, and set the .left and .top on each element as I create it so I can move the elements later on.
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Jan 20, 2010
i have found a possible bug in 1.4 but it's only in Internet Explorer 7 & 8.The following code does not work and completely ruins every peice of jquery on the page (that means everything inside $(document).ready and anyting else...
$("<div/>",{
id: 'tooltip-'+rand,
class: 'dock-tooltip',
[code]....
I cant see any syntax errors - i pulled the example from the 1.4 site. There is no trailing commas in the object notation and i really cant see any reason it would work in firefox and not IEx and more to the point not only not work in IEx but break any other jquery in the entire page....
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Mar 4, 2011
I'm working with a large (and unweildy) ASP.NET application, and there is a lot of jQuery code that uses selectors like this:
[name=_aspnetControl$_withASubControl] And unfortunately, some selectors that also look like this:
[name^=_someAspNetControl$_radioButtonList].
In other words, the effort to remove the $ from the attribute selectors would be monumental. If it is possible to escape the $ symbols, I can do that easily enough, but unfortunately the situation right now means that I can't upgrade to jQuery 1.5.
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Sep 1, 2010
I'm learning jQuery with XML. I'm familiar with other query languages such as XPath. I'm having a little bit of difficulty wrapping my brain around how jQuery works but I think I can make the leap if I see a solution to a problem I know how to solve with other methods Given the following XML, please share a jQuery solution to finding the value of attribute B in elements named bar where attribute A has the value 30:
[Code]...
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Apr 24, 2007
I'll trying to tell the difference between the following three cases:
<img alt="text string" />
<img alt="" />
<img />
I can do this in Firefox with the following code, where elem is the
HTMLElement representing each image, but IE doesn't seem to
differentiate between empty string and undefined.
var alt = elem.getAttribute('alt');
alt = (alt) ? alt : ((alt===null) ? 'really_null' : "");
The desired output from running this code on the 3 tags above is:
text string
really_null
It seems like this should be really easy...but I'm having a really
difficult time trying to figure out what's going on...
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Apr 13, 2011
$(document).ready(function() {
The SELECTor shows up in the document but it's not MULTIPLE, no ALT text, no CLICK event handler.
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Jul 23, 2005
How to check for null attribute in form input field using IE
this does not work in IE:
var curr_id = tablecells[i].getAttribute('name');
if (curr_id != null){
....
}
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Jul 23, 2005
How can I read the object's attribute's name ? I mean something like this:
x = new Object
x.myAttr = 5
and how to get the 'myAttr' string ?
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