function $(key) {
	return document.getElementById(key);
}

function submitLogin() {
	var user_name = $('email').value;
	var passwd = $('password').value;
	if (user_name.length==0) {
		$('error').innerHTML = "<font color='#FF6600'>请输入用户名。</font>";
		$('email').focus();
	}
	else if (passwd.length==0) {
		$('error').innerHTML = "<font color='#FF6600'>请输入密码。</font>";
		$('password').focus();
	}
	else {
		dotnetajax.login(user_name, passwd, onLoginSucceeded);
	}
}

function onLoginSucceeded(result) {
	if (result==true) {
		//注册成功
		if (f) {
			window.location.href=f;
		}
		else {
			window.location.href="/user/";
		}
		
	}
	else {
		//注册失败
		$('error').innerHTML = "<font color='#FF6600'>用户名密码错误，请重新输入。</font>";
		$('password').value = "";
	}
}

function onEmailKeypress(e) {
	if(window.event) { //IE
		keynum = e.keyCode;
	}
	else if(e.which) { // Netscape/Firefox/Opera
		keynum = e.which;
	}
	if (keynum==13)
	{
		$("password").focus();
	}
}

function onPasswordKeypress(e) {
	if(window.event) { //IE
		keynum = e.keyCode;
	}
	else if(e.which) { // Netscape/Firefox/Opera
		keynum = e.which;
	}
	if (keynum==13)
	{
		submitLogin();
	}
}