function __doPostBack(eventTarget, eventArgument) 
{
        var theform;
        if (window.navigator.appName.toLowerCase().indexOf("microsoft") > -1) {
            theform = document.Form1;
        }
        else {
            theform = document.forms["Form1"];
        }
//        theform.__EVENTTARGET.value = eventTarget.split("$").join(":");
//         theform.__EVENTARGUMENT.value = eventArgument;
        theform.submit();
}