cfinput required attribute doesn't work!!

Hi,

I have the following code like this. and I have built two web sites with different port in IIS.

<cfinput type="text" name="username" required="yes" Message="Please enter your Username" title="Please enter your Username" >

the code works in one web site but doesn't work in other site.

I guess I need change IIS site property setings to fix this.

the error message is "Object expected', the problem is the javascript code generated with cfinput.

Please give me a idea how to fix this.

Thanks

Mark