function waitForKeyElements(selectorTxt, actionFunction, bWaitOnce, iframeSelector) {
    var targetNodes, btargetsFound;

    if (typeof iframeSelector == "undefined") targetNodes = $(selectorTxt);
    else targetNodes = $(iframeSelector).contents().find(selectorTxt);

    if (targetNodes && targetNodes.length > 0) {
        btargetsFound = true;
        targetNodes.each(function () {
            var jThis = $(this);
            var alreadyFound = jThis.data('alreadyFound') || false;

            if (!alreadyFound) {
                var cancelFound = actionFunction(jThis);
                if (cancelFound) btargetsFound = false;
                else jThis.data('alreadyFound', true);
            }
        });
    }
    else { btargetsFound = false; }

    var controlObj = waitForKeyElements.controlObj || {};
    var controlKey = selectorTxt.replace(/[^\w]/g, "_");
    var timeControl = controlObj[controlKey];

    if (btargetsFound && bWaitOnce && timeControl) {
        clearInterval(timeControl);
        delete controlObj[controlKey]
    }
    else {
        if (!timeControl) {
            timeControl = setInterval(function () { waitForKeyElements(selectorTxt, actionFunction, bWaitOnce, iframeSelector) }, 300);
            controlObj[controlKey] = timeControl;
        }
    }
    waitForKeyElements.controlObj = controlObj;
}

waitForKeyElements.cancel = function (selectorTxt) {
    var controlObj = waitForKeyElements.controlObj || {};
    var controlKey = selectorTxt.replace(/[^\w]/g, "_");
    var timeControl = controlObj[controlKey];

    if (timeControl) {
        clearInterval(timeControl);
        delete controlObj[controlKey];
    }

    waitForKeyElements.controlObj = controlObj;
};