I now looks like this:
var currentVersion = "1.0";function checkForUpdate(){ var updateRequest = new XMLHttpRequest(); updateRequest.open("GET", "http://site/updaters/update_v.txt", false); updateRequest.send(null); var updateRequestText = updateRequest.responseText; if(updateRequestText == (currentVersion)){ document.getElementById('newUpdate').style.display = 'none'; }}function openLink(url){ if(window.widget){ widget.openURL(url); } else{ window.location = url; }}