function CheckEnterKey(event) {
		var code = 0;
	
		NS4 = (document.layers) ? true : false;
		if(NS4) {
			code = event.which;
		} else {
			code = event.keyCode;
		}
		if(code == 13) {
			Login();
		}
	}

	function Login() {
		document.form_login.submit();
	}