C# asp.net 後台script

public void showScript(string pMessage)
    {
        this.ClientScript.RegisterStartupScript(this.GetType(), "", "<script language = javascript>alert('" + pMessage + "')</script>");

        //指令碼
        Type cstype = this.GetType();
        ClientScriptManager cs = this.ClientScript;
        StringBuilder cstext2 = new StringBuilder();
        cstext2.Append("<script type=\"text/javascript\"> function DoClick() {");
        cstext2.Append("document.getElementById('Message').style.width=60;} </");
        cstext2.Append("script>");
        cs.RegisterClientScriptBlock(cstype, "ButtonClickScript", cstext2.ToString(), false);
    }