Re: FN-FORUM: iframes, was: site check please

date posted 14th May 2007 14:13

Ben Johnson (Neogic) F wrote:
> Phil wrote:
>> Nice. Just a couple of points though, is $() defined somewhere else as
>> something doing getElementById()? And are the three equals signs together
>
>> a typo (on the line "if(sTmp==='')") ?
>
>
> $ is a commonly defined (but not built-in) Javascript function that acts as
> a shortcut to getElementById().

It actually does more. Elements returned by getElementByID are not
extended in the way those elements returned by $() are.

Using the prototype js this would not work:

e=document.getElementByID('somediv');
e.hide();

This would:

e=$('somediv');
e.hide();

But this last example can be done better if e is not to be used again:

$('somediv').hide();

Regards
Richard
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