打开指定大小的模式窗体

public static void ShowModalDialogWindow(string webFormUrl, int width, int height, int top, int left)
        {
            #region
            string features = "dialogWidth:" + width.ToString() + "px"
                + ";dialogHeight:" + height.ToString() + "px"
                + ";dialogLeft:" + left.ToString() + "px"
                + ";dialogTop:" + top.ToString() + "px"
                + ";center:yes;help=no;resizable:no;status:no;scroll=yes";
            ShowModalDialogWindow(webFormUrl, features);
            #endregion
        }
public static void ShowModalDialogWindow(string webFormUrl, string features)
        {
            string js = ShowModalDialogJavascript(webFormUrl, features);
            HttpContext.Current.Response.Write(js);
        }

        public static string ShowModalDialogJavascript(string webFormUrl, string features)
        {
            #region
            string js = @"<script language=javascript>                            
                            showModalDialog('" + webFormUrl + "','','" + features + "');</script>";
            return js;
            #endregion
        }