本文实例讲述了JS判断页面是否出现滚动条的方法。分享给大家供大家参考。具体如下：
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
};
};
希望本文所述对大家的javascript程序设计有所帮助。