Please read our tutorial: http://prototypejs.org/learn/extensions

That will explain it all.

Tobie

On Jul 2, 5:48 pm, si <[EMAIL PROTECTED]> wrote:
> <html>
> <head>
> <script type="text/javascript" src="js/prototype.js"></script>
> <script>
>         function foo(o){
>                 alert(o.up('div').getAttribute('id'));
>         }
>
>         function bar(){
>                 alert($('h2').up('div').getAttribute('id'));
>         }
> </script>
> </head>
> <body>
>         <div id="div1">
>                 <a id="h1" href="#" onclick="foo(this); return false;">foo</a>
>                 <a id="h2" href="#" onclick="bar(this); return false;">bar</a>
>         </div>
> </body>
>
> </html>
>
> this code got error "Object doesn't support this property or method"
> when click into "foo" link in IE 6/7. with FF/Opera both links work
> properly.


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