Get Selected Text

function getSelText(win) {
    var text = $.trim(win.getSelection().toString());
    if (text.length > 0) return text;
   
    var iframes = win.document.getElementsByTagName("iframe");
    for (var i = 0; i < iframes.length; i++) {
        text = getSelText(iframes[i].contentWindow);
        if (text.length > 0) return text;
    }
   
    return "";
}