function validate(form_id,email) {

   var passFlag = true;
    
  
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   var address = document.forms[form_id].elements[email].value;
   if(reg.test(address) == false) {
	  document.forms[form_id].elements[email].style.color = '#FF0000';
;
      passFlag = false;
   } else
   {
	  document.forms[form_id].elements[email].style.color = '#000000';
   }   
   return passFlag;
}