Hi,

 

Can you select files ?

 

I think there must be some script error , which prevent the 'return false' to be executed, so the button submit the form.

 

you can try :

 

buttonsubmit.onclick=function()

{

    try

   {

      //put the code here

   }

   catch(x)

   {

     alert(x.message);

   }

   return false; //return false to cancel submit..
}

 

Regards,
Terry