Losing focus after AutoPostBack in UpdatePanel (solution)

ref: http://forums.asp.net/t/1077882.aspx?Losing+focus+after+AutoPostBack+in+UpdatePanel

solution

you can call this function

function RestoreFocus_For_AutoPostBack() {
    var oldId;

    var page = Sys.WebForms.PageRequestManager.getInstance();
    page.add_beginRequest(SaveOldId);
    page.add_endRequest(SetNewFocus);

    function SetNewFocus(source, args) {
        $("#" + oldId).next().focus();
    }
    function SaveOldId(source, args) {
        oldId = args.get_postBackElement().id;$("#" + oldId).next().blur();
    }
}