function CheckLogin(obj)
{
	var o=document.LoginForm;
	if(o.UserId.value.length<4 || o.UserId.value.length>16)
	{
		alert("用户名长度应在4到16个字符之间！");
		o.UserId.focus();
		return false;
	}
	if(o.UserPwd.value.length<4 || o.UserPwd.value.length>16)
	{
		alert("密码长度应在4到16个字符之间！");
		o.UserPwd.focus();
		return false;
	}
	//if(o.Code.value.length!=4)
	//{
		//alert("请输入正确的验证码!");
		//o.Code.focus();
		////return false;
	//}
	obj.style.cursor='default';	
	obj.disabled='false';
	document.forms["LoginForm"].submit();
    return true;
}
function EndterCheckLogin(e)
{
    var keynum;

    if(window.event) // IE
    {
        keynum = e.keyCode;
    }
    else if(e.which) // Netscape/Firefox/Opera
    {
        keynum = e.which;
    }
    if(keynum=="13")
    {
        var obj=document.getElementById("btnsubmit");
        CheckLogin(obj)
    }  
}
function RefreshImage()
{
	document.getElementById("imgcode").src='/inc/code.aspx';
}

function GetDates()
{
	var nowDate=new Date();
	var onlineDate=new Date(2008,7,8,0,0,0,0);
    document.write(Math.ceil((nowDate-onlineDate)/1000/60/60/24));
};