function validate_login() {
	
	var error = "";
	
	
	
	
	if(window.document.form1.username.value=="") {
		error += "* Username Harus Diisi. \r";
	}
	
	if(window.document.form1.password.value.length=="") {
		error += "* Password Harus Diisi. \r";
	
	}
	
	
	
	
	if(error) {
		error = "Ups, Ada Kesalahan : \r\r" + error + "\r";
		alert(error);
		return false;
	} else {
		return true;
	}
}