Question

JavaScript - Can't get element

Asked by: RegProctor

I thought GetElementById was straight forward but I can't get it to pick up the element I want. I'm sure a JS guru would know why, it's got to be something simple.

Attached is my code and at the URL you can see that I do have an element with the ID. Any help appreciated.

function moveHandle() {
	var i = $("lighting-outdoor");
	document.getElementById("lighting-outdoor").bottom = "1px";
  document.recalc(true);
}
 
function ieCleanup() {
	var version=parseFloat(navigator.appVersion);
	if ((navigator.appName == "Microsoft Internet Explorer") && (version = 7)) {
		var t=setTimeout(moveHandle(),5000);
	}
}
window.onLoad=ieCleanup();

                                  
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Asked On
2008-01-24 at 04:55:04ID23107475
Tags

JavaScript

,

IE7

,

www.lightingatwillowglen.com

Topics

Cascading Style Sheets (CSS)

,

Dynamic HTML (DHTML)

,

JScript

Participating Experts
2
Points
200
Comments
6

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Answers

 

by: RegProctorPosted on 2008-01-24 at 04:59:32ID: 20732559

I found that there is a GetElementById bug in IE so I tried a workaround, that did help either. Here is the workaround.

// use $('myId') instead of document.getElementById('myId')
var $ = function (id, doc) {
	if((id)&&((typeof id == "string")||(id instanceof String))){
		if (!doc) { doc = document; }
		var ele = doc.getElementById(id);
		if (ele && (ele.id != id) && doc.all) {
			ele = null;
			eles = doc.all[id];
			if (eles) {
				if (eles.length) {
					for (var i=0; i < eles.length; i++) {
						if (eles[i].id == id) {
							ele = eles[i];
							break;
						}
					}
				} else { ele = eles; }
			}
		}
		return ele;
	}
	return id;
};
 
function moveHandle() {
	var i = $("lighting-outdoor");
//alert(i);
//	i.bottom = "1px";
//  document.recalc(true);
	return true;
}
 
function ieCleanup() {
	var version = parseFloat(navigator.appVersion);
	if ((navigator.appName == "Microsoft Internet Explorer") && (version = 7)) {
		var t=setTimeout("moveHandle();",10000);
	}
}
window.onLoad=ieCleanup();
                                              
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by: AlbertVanHalenPosted on 2008-01-24 at 13:49:30ID: 20737852

Forget your workaround because you are using jquery allready.
You want to get the img element with the id lighting-outdoor?

Use :  var i = $("#lighting-outdoor");
Mind the # !

After that you can alter it's css by using i.css("bottom", "1px")

you could also say $("#lighting-outdoor").css("bottom","1px);

 

by: LeeKowalkowskiPosted on 2008-01-25 at 01:16:31ID: 20741127

>>document.getElementById("lighting-outdoor").bottom = "1px";

What did you expect this to do?  Surely it's .style.bottom?

The only 'bug' I know of in IE with getElementById is it treats the NAME and ID attribute as synonymous.  If you have a clash, it will return the first element with that ID or NAME.  Other than that, getElementById should work a treat.  What is your bug, exactly?  Do you have an example of some HTML where document.getElementById fails?

--
Lee

 

by: RegProctorPosted on 2008-01-25 at 21:55:40ID: 20748639

If you want to know what ultimately I am trying to solve, its actually the question below I asked that never got resolved directly. So instead I started to tackle the JavaScript that I hoped would solve it, and, of course being very rusty on JS (I haven't used it for 5 years or more) I got stuck.

Here's the original problem I am trying to solve:
http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/CSS/Q_23099037.html

 

by: RegProctorPosted on 2008-01-25 at 21:59:29ID: 20748642

Thanks! AlbertVanHalen, that insight was great. I have a bunch of stuff loaded that I don't know all of what it can do because it a full content management system that I am using and of course that means I only modified what I needed to and the rest was written by someone else.

 

by: RegProctorPosted on 2008-01-25 at 22:11:20ID: 20748657

Thanks so much, it worked like a charm, here's the code. If you know a cleaner way to do this please do tell! Thanks.

function moveHandle() {
	$("#lighting-outdoor").css("bottom","1px");
	return true;
}
 
function ieCleanup() {
	var version = parseFloat(navigator.appVersion);
	if ((navigator.appName == "Microsoft Internet Explorer") && (version == 7)) {
		var t=setTimeout("moveHandle();",10000);
	}
}
window.onLoad=ieCleanup();
                                              
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