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();
 }