protected void Page_Load(object sender, EventArgs e)
{
Response.Expires = -1;
width = URLHelper.GetRequestQuery <int>("w", width, Convert.ToInt32);
height = URLHelper.GetRequestQuery("h", height, Convert.ToInt32);
//string checkCode = CreateRandomCode(4);
string checkCode = RandomCode.GetRandomCode(StringPlus.NumberConst, 4);
Session["CheckCode"] = checkCode; //checkCode;
RandomCode.ResopnseColorImage(Context, width, height, checkCode);
//CreateImage(checkCode);
}