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