Re: shortcut for document.getElementById and some error

HopfZ wrote on 30 jun 2006 in comp.lang.javascript:

Evertjan. wrote:

r = EBI3['myText']

or:

r = EBI3.myText


Both returns null (without error).

You are right, my mistake.

getElementById needs an (argument)


--------- test.html ----------------
<html>
<head>
<title>test</title>
<script language="javascript">

use <script type='text/javascript'>

function load(){
function assert(b,s){ if(!b) alert('false is\n'+s);}

function EBI2(id){return document.getElementById(id)};
var EBI3 = document.getElementById;
document.EBI4 = document.getElementById;

assert(EBI2('myText'),'EBI2 works');
assert(EBI3['myText']==null,'EBI3["myText"] returns null');

Do not test for null, test for existence. see below.

assert(EBI3.myText==null,'EBI3.myText returns null');
assert(document.EBI4.myText==null, 'document.EBI4 works');

document.EBI4.myText does not work too !!!!!


alert('end of load');
}
</script>
</head>
<body onload="load();">
<form id="myForm">
<input type="text" id="myText"></input>

</input> is not html

</form>
</body>
</html>

Try this:

<html>
<head>
<script type='text/javascript'>
function load(){
function assert(b,s){ if(!b) alert(s);}

function EBI2(id){return document.getElementById(id)};
var EBI3 = document.getElementById;
document.EBI4 = document.getElementById;

assert(EBI2('myText'),'EBI2 error'); // OK SKIPS
assert(EBI3['myText'],'EBI3["myText"] error'); // ERRORS
assert(EBI3.myText,'EBI3.myText error'); // ERRORS
assert(document.EBI4.myText, 'document.EBI4 error'); // ERRORS

alert('end of load');
}
</script>
</head>
<body onload="load();">
<form>
<input type="text" id="myText">
</form>
</body>
</html>




--
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)
.

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