function check_login() 
{ 
	if (document.login.email.value == "") 
	{ 
		alert('Check User ID'); 
		document.login.email.focus(); 
		return false; 
	} 
	if (document.login.password.value == "") 
	{ 
		alert('Check Password'); 
		document.login.password.focus(); 
		return false; 
	} 
}