function confirmSubmit(formi) {
   if (formi=='feedback_form') {
      var arr=new Array('Name', 'CompanyName', 'Email', 'Message');
      var errors=0;
      i=0;
      for (i = 0; i < arr.length; i++) {
         var chkfield=eval('document.forms.' + formi + '.' + arr[i]);
         if (chkfield.value=='') {
            if (chkfield.type=='text') {
                 chkfield.className='textfield_validate_error';
            }
            if (chkfield.type=='textarea') {
                 chkfield.className='txtarea_validate_error';
            }
            errors=1;
         } else {
            if (chkfield.type=='text') {
               chkfield.className='textfield';
            }
            if (chkfield.type=='textarea') {
               chkfield.className='txtarea';
            }
         }
      }
      if (errors==0) {
         return true;
      } else {
         alert('Please fill in the required field(s)');
         return false;
      }
   }
}