function __doPostBack(eventTarget, eventArgument) {
        var theform;
        if (window.navigator.appName.toLowerCase().indexOf("microsoft") > -1) {
            theform = document.getElementById("form1");
        }
        else {
            theform = document.getElementById("form1");
        }
        theform.__EVENTTARGET.value = eventTarget.split("$").join(":");
        theform.__EVENTARGUMENT.value = eventArgument;
        theform.submit();
    }