The polling example seems to be executing the polling JavaScript on every request resulting in a runaway timer.

Another example of the polling JavaScript call was implemented like this.

 "<script language=\"JavaScript\" type=\"text/javascript\">\n" +
            "// <![CDATA[\n" +
            " function polingCall(){\n" +
            " if (document.getElementById('polingForm')){\n"+
            " document.getElementById('polingForm').submit();\n" +
            " setTimeout( \"polingCall()\" , " + refreshFolderInterval + ");\n" +
            " }\n" +
            " }\n" +
            "\n" +
            "// ]]>\n" +
            "</script>";

Where polingColl() was called from the body onload attribute. We did figure out away to suppress the setInterval() Javascript call in the polling call from getting executed on every request.