function ChKlogin() {
var f = document.login_form;
if (f.username.value=="" || f.password.value=="") {
alert("请输入用户名或密码！");
f.username.focus();
return false;
}else {
return true;
}
}
function login() {
if(!ChKlogin()) {
return false;
}
}
function reg() {
window.open ("/memberCenter/register.jsp");
}