如何使用 日期.js

protected void Page_Load(object sender, EventArgs e)    {            string datejs = "<mce:script language='javascript' src="js/Calendar30.js" mce_src="js/Calendar30.js" charset='gb2312'></mce:script>";             if (!Page.IsClientScriptBlockRegistered("clientScript3") && datejs != "")            {                    Page.RegisterClientScriptBlock("clientScript3", datejs);            }            ttt.Attributes.Add("onclick", "calendar(this);return false;");    }