IE 下与元素重叠的区域为 img（该元素在上img在下),且该元素无背景(background:none、transparent)，无可见内容(如 display none,visibllity hidden,left:-9999px; ) ,则该区域无法触发鼠标事件

复制代码代码如下:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<title>test</title>
<style>
.ad-gallery{
position: relative;
width: 400px;
height: 350px;
overflow: hidden;
}
.ad-gallery .ad-prev,.ad-gallery .ad-next{
position: relative;
display: inline-block;
*display: inline;
*zoom:1;
float: left;
width:200px;
height: 100%;
z-index:100;
background-image: url(about:blank); /* IE ，与元素重叠的区域为 img（该元素在上img在下),且该元素无背景(background:none、transparent)，无可见内容(如 display none,visibllity hidden,left:-9999px; ) ,则该区域无法触发鼠标事件 */
}
.ad-gallery .prevHandle ,.ad-gallery .nextHandle{
position:absolute;
left:0;
right: 0;
top: 0;
bottom: 0;
margin:auto;
*top:50%;
*left:50%;
*margin-left: -50px;
*margin-top: -75px;
width: 100px;
height: 150px;
line-height: 150px;
background: #313131;
font-size: 14px;
text-align: center;
color: #ddd;
background: #313131;
display: none;
/*visibility: hidden;*/
/*left:-9999px; */
}
.ad-gallery .ad-img{
position: absolute;
top:0;
left:0;
z-index: 0;
width: 100%;
height: 100%;
}
.ad-gallery .desc{
position: absolute;
left: 0px;
bottom: 0px;
margin:0;
width: 100%;
height: 50px;
line-height: 50px;
background: #313131;
color: #eee;
text-indent: 10px;
z-index: 99;
}
.opacity60{
*filter:alpha(opacity=60);/*IE6、7*/
-ms-filter:"progid:DXImageTransform.Microsoft.Alpha(opacity=60)"; /*IE8*/
opacity: 0.6;
}
</style>
</head>
<body>
<div id="gallery" class="ad-gallery">
<img class="ad-img" src="//img.jbzj.com/file_images/article/201301/2013118165025387.jpg" />
<div class="ad-prev"><div class="prevHandle opacity60">上一张</div></div>
<div class="ad-next"><div class="nextHandle opacity60">下一张</div></div>
<div class="desc opacity60">image description</div>
</div>
<!--test-->
<div>
<img class="ad-img" width="100" height="50" src="http://imgbuyun.weixiu-service.com/up79/202309/xs4ei2avtgw.jpg" />
<div onm ouseover="alert(1);"></div>
</div>
<script>
var gallery = document.getElementById("gallery");
var elmInGallery = gallery.getElementsByTagName("*");
var mouseover = function(event){
event = event||window.event;
var target = (event.srcElement||event.target);
console.log(============= event log ===============);
console.log(1. ,this.className, | ,target.className, | ,target==this?eventSrc:eventTraval);
if((/ad-prev|ad-next/).test(this.className)){
console.log(2. ,handle active);
this.getElementsByTagName("div")[0].style.display = "block";
}
};
for(var i=0;i<elmInGallery.length;i++){
elmInGallery[i].onmouseover = mouseover;
}
</script>
</body>
</html>