JS to determine whether the page appears scroll bar method _javascript Skills

This article is an example of JS to determine whether the page scroll bar method. Share to everyone for your reference. Specifically as follows:

var isscroll = function (EL) {
   //test targets
   var elems = El? [El]: [Document.documentelement, document.body];
   var scrollx = false, scrolly = false;
   for (var i = 0; i < elems.length i++) {
     var o = elems[i];
     Test horizontal
     var sl = o.scrollleft;
     O.scrollleft + + (SL > 0)? -1:1;
     O.scrollleft!== SL && (scrollx = Scrollx | | true);
     O.scrollleft = SL;
     Test vertical
     var st = o.scrolltop;
     O.scrolltop + + (St > 0)? -1:1;
     O.scrolltop!== St && (scrolly = scrolly | | true);
     O.scrolltop = st;
   }
   RET return
   {
     scrollx:scrollx,
     scrolly:scrolly
   }
 ;

I hope this article will help you with your JavaScript programming.