function f_clientWidth() {
	return f_filterResults (
		window.innerWidth ? window.innerWidth : 0,
		document.documentElement ? document.documentElement.clientWidth : 0,
		document.body ? document.body.clientWidth : 0
	);
}
function f_clientHeight() {
	return f_filterResults (
		window.innerHeight ? window.innerHeight : 0,
		document.documentElement ? document.documentElement.clientHeight : 0,
		document.body ? document.body.clientHeight : 0
	);
}
function f_scrollLeft() {
	return f_filterResults (
		window.pageXOffset ? window.pageXOffset : 0,
		document.documentElement ? document.documentElement.scrollLeft : 0,
		document.body ? document.body.scrollLeft : 0
	);
}
function f_scrollTop() {
	return f_filterResults (
		window.pageYOffset ? window.pageYOffset : 0,
		document.documentElement ? document.documentElement.scrollTop : 0,
		document.body ? document.body.scrollTop : 0
	);
}

function f_scrollHeight() {
	return f_filterResults (
		window.pageYOffset ? window.pageYOffset : 0,
		document.documentElement ? document.documentElement.offsetHeight : 0,
		document.body ? document.body.scrollHeight : 0
	);
}
function f_filterResults(n_win, n_docel, n_body) {
	var n_result = n_win ? n_win : 0;
	if (n_docel && (!n_result || (n_result > n_docel)))
		n_result = n_docel;
	return n_body && (!n_result || (n_result > n_body)) ? n_body : n_result;
}

function hidescreen(){
   document.getElementById("_hidden_bg").style.display = "none";
   document.getElementById("_hidden_screen").style.display = "none";
   document.getElementById("_inner_screen").innerHTML = "";
	
}

function playIt(num){
   var _s = arr_video[num];
   if(_s.substring(0,4)=="http"){
      window.open(_s);
   }
   else
   {
      var _bg = document.getElementById("_hidden_bg");
      _bg.style.height = $(document).height() + "px"; //f_scrollHeight() + f_clientHeight() + "px";
      _bg.style.display = "";
      document.getElementById("_hidden_screen").style.display = "";
   
      _s = _s.replace(/autoplay=0/g,"autoplay=1&loop=1");
      document.getElementById("_inner_screen").innerHTML = _s;
   }
}