var lastFocusedControlId = ""; function focusHandler(e) { document.activeElement = e.originalTarget; } function appInit() { if (typeof (window.addEventListener) !== "undefined") { window.addEventListener("focus", focusHandler, true); } Sys.WebForms.PageRequestManager.getInstance().add_pageLoading(pageLoadingHandler); Sys.WebForms.PageRequestManager.getInstance().add_pageLoaded(pageLoadedHandler); } function pageLoadingHandler(sender, args) { lastFocusedControlId = typeof (document.activeElement) === "undefined" ? "" : document.activeElement.id; } function focusControl(targetControl) { if (Sys.Browser.agent === Sys.Browser.InternetExplorer) { var focusTarget = targetControl; if (focusTarget && (typeof (focusTarget.contentEditable) !== "undefined")) { oldContentEditableSetting = focusTarget.contentEditable; focusTarget.contentEditable = false; } else { focusTarget = null; } targetControl.focus(); if (focusTarget) { focusTarget.contentEditable = oldContentEditableSetting; } } else { targetControl.focus(); } } function pageLoadedHandler(sender, args) { if (typeof (lastFocusedControlId) !== "undefined" && lastFocusedControlId != "") { var newFocused = $get(lastFocusedControlId); if (newFocused) { focusControl(newFocused); } } } Sys.Application.add_init(appInit);