function validate(){

	if (document.form1.user_name.value == '') {	
		alert("Enter username");
		document.form1.user_name.focus();
		return false;
		
	}
		
	if (document.form1.password.value == '') {	
		alert("Enter password");
		document.form1.password.focus();
		return false;
		
	}
		
	return true;
	
	}