function signupvalid(frm)
{
 
  
 email = frm.signup_email;

 err_flag = 0;
 
  if (email.value == "" || !validate_eml(email.value))
   {
   alert ("Please enter proper Email!");
   email.focus();
   return false; 
  }
  
}

function validate_eml(e)
{
 var str=e;
 var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i

 if (!filter.test(str))
  return false;
 else
  return true;
}