/*
 * @author       Rob W (http://stackoverflow.com/a/7513356/938089
 * @description  Executes function on a framed YouTube video (see previous link)
 *               For a full list of possible functions, see:
 *               http://code.google.com/apis/youtube/js_api_reference.html
 * @param String frame_id The id of (the div containing) the frame
 * @param String func     Desired function to call, eg. "playVideo"
 * @param Array  args     (optional) List of arguments to pass to function func*/
function callPlayer(frame_id, func, args) {
    if (window.jQuery && frame_id instanceof jQuery) frame_id = frame_id.get(0).id;
    var iframe = document.getElementById(frame_id);
    if (iframe && iframe.tagName.toUpperCase() != 'IFRAME') {

        iframe = iframe.getElementsByTagName('iframe')[0];
    }
    if (iframe) {  
        // Frame exists, 
        iframe.contentWindow.postMessage(JSON.stringify({
            "event": "command",
            "func": func,
            "args": args || [],
            "id": frame_id
        }), "*");
    }
}
;;