function validate(form_id,loginid,loginpassword) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   var address = document.forms[form_id].elements[loginid].value;
   if(reg.test(address) == false) {
      alert('Invalid Email Address');
      return false;
   }
   if (document.forms[form_id].elements[loginpassword].value=="")
   {
   alert('Enter Valid Password');
      return false;
   }
}