onmouseout 发现它的触发太敏感，当经过层内文字链时，即触发onmousetout事件，功能不能正常显示，经过一番搜索，整理出来，供大家参考。
1、
<script type="text/javascript">
function test(obj, e) {
if (e.currentTarget) {
if (e.relatedTarget != obj) {
if (obj != e.relatedTarget.parentNode) {
alert(1);
}
}
} else {
if (e.toElement != obj) {
if (obj != e.toElement.parentNode) {
alert(1);
}
}
}
}
</script>
<div onmouseout="test(this, event)" style="width:100px;height:100px;border:1px #666 solid">
<span style="margin:5px;width:100%;height:100%;border:1px #ff0000 solid">faddsf</span> </div>
2、
var LeaveFunext = function(t,f){for(var p in f){t[p]=f[p]} return t};
var IE = '\v' == 'v';
var contains = function(wrap,child){
if(IE) return wrap.contains(child);
while(child && typeof(child.parentNode) != "undefind"){
if(wrap == child) return true;
child = child.parentNode;
}
return false;
};
var LeaveFun = function(o){
var _o = typeof o =="string" ? document.getElementById(o) : o;
return this == window ? new LeaveFun(_o):LeaveFunext(_o, LeaveFun.prototype);
};
LeaveFun.prototype = {
mouseleave : function(fn){
if(IE){
this.attachEvent('onmouseleave',fn);
}else{
this.addEventListener('mouseout',function(e){
tar = e.relatedTarget;
if(!contains(this, tar)){
fn.call(this);
}
}, false);
}
return this;
}
};
//调用
LeaveFun('share_customerdiv').mouseleave(function(){document.getElementById('share_customerdiv').style.display ='none';})
3、最简单，但在部分系统上会有轻微闪烁。
<div style="z-index: 11; " onmouseout="this.style.display='none'" onmouseover="this.style.display='block'" >
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</div>