document.onkeydown=function(evt){
        evt = (evt) ? evt : ((window.event) ? window.event : "");
        var key = evt.keyCode?evt.keyCode:evt.which;
        if(key==13)Login();
}

function Login(){
    var UserName=$("#UserName").val();
    var PassWord=$("#PassWord").val();
    var IsSave=false;
    if($("#IsSave").length>0)
        IsSave=$("#IsSave")[0].checked;
    if(UserName==""||UserName=="网校号或邮箱"){
        alert("请输入网校号或者Email");
        $("#UserName").focus();
    }
    else if(PassWord==""){
        alert("请输入密码");
        $("#PassWord").focus();
    }else{
        var Info={};
        Info.UserName=UserName;
        Info.PassWord=PassWord;
        Info.IsSave=IsSave;
        if($("#Code").length>0)Info.Code=$("#Code").val();
        $.post("/Login.DoLogin.data",Info,function(data){
            if(data.R!="ok"){
                alert(data.R);
            }else{
                   var ReturnUrl=$("#ReturnUrl").val();
                   if(ReturnUrl==""||$("#ReturnUrl").length<1)ReturnUrl="http://office.30edu.com";
                   var SSOImg=new Image();
                   SSOImg.onload=SSOImg.onerror=function(){location=ReturnUrl};
                   SSOImg.src="http://sso.cn21edu.com/?SSO="+data.SSO;
            }
        },"json")
    }
}