function val_email(email,set_focus) {
// parameter email - object being validated
 	if (email.className == 'error') {
		email.className = '';
	}

  if (isblank(email.value))
    return true;

  if (set_focus && set_focus != null)
  	var w_set_focus = set_focus;
  else
    var w_set_focus = 'Y';
	
	var e = email.value;
	var w_error = false;

	var x = e.indexOf('@');
	if (x <= 0)
		w_error = true;
	else {
 		var y = e.substr(x+1,e.length - x);
 		var z = y.indexOf('.');
 		if (z <= 0 || z == y.length - 1)
 			w_error = true;
	}

	if (w_error){
		alert('Invalid email address. Use *@*.* format');
		email.select();
		if(w_set_focus == 'Y'){
			email.focus();
		}
		return false;
	}
	else
		return true;
}