js广告轮询效果

var intervalTime = 5000;
var showIndex = 0;
var imageLength=0;
$(window).load(function () {
var height = $("#swfLoad").height();
var width = $("#swfLoad").width();
$("#swfLoad img").each(function (index) {
$(this).height(height).width(width).css("position", "absolute").css("top", 0).css("left", 0);
if (index == "0") {
$(this).css("visibility", "visible");
}
else {
//$(this).css("visibility", "hidden");
}
imageLength++;
});
setInterval("change();", intervalTime);
});
function change() {
$("#swfLoad img").eq(showIndex).fadeOut(1000);
showIndex++;
if (showIndex >= imageLength) {
showIndex = 0;
}
$("#swfLoad img").eq(showIndex).fadeIn(1000);
}
</script>
<div id="swfLoad" style="position:relative;visibility:visible; width:700px; height:280px;">
<img src="../../Images/1355799066906_000.jpg" alt="" />
<img src="../../Images/1369276714638_000.jpg" alt="" />
<img src="../../Images/1369277578381_000.jpg" alt="" />
<img src="../../Images/1371957347577_000.jpg" alt="" />
</div>