click onmouseover onmouseout 配合超炫的功能

var flag = 0;
function mouseout(ev)
{
 if(flag == 0)
 {
  var list = document.getElementsByTagName("li");
  ev = ev || window.event;
    var tmp = ev.target || ev.srcElement;
  tmp = (tmp.tagName == "LI")?tmp:tmp.parentNode;
  tmp.className = "list_item";
 }
}
function mouseover(ev)
{
 flag = 0;
 var list = document.getElementsByTagName("li");
 ev = ev || window.event;
   var tmp = ev.target || ev.srcElement;
 tmp = (tmp.tagName == "LI")?tmp:tmp.parentNode;
 tmp.className = "list_item_over";
}
function mouseclick(ev)
{
 flag = 1;
 var list = document.getElementsByTagName("li");
 ev = ev || window.event;
   var tmp = ev.target || ev.srcElement;
    tmp = (tmp.tagName == "LI")?tmp:tmp.parentNode;
 tmp.className = "list_item_over";
}

页面代码

<li class="list_item"  onmouseover="mouseover();" onclick="mouseclick();" onmouseout="mouseout();" ><span>1</span><span>公司名</span><span>1</span><span>0</span><span>1</span><span>2009-03-14</span><span>改</span><span>删</span>

IE下的事件会具有冒泡行为，也就是说你点击<a>,click事件会向上传递到li。
之所以你的代码点击A会变色，是因为你传递的就是li对象，而3楼的写法是改变事件源的class，当你点击A，那么事件源就是A，改变的也是A的class，所以不会变色，你可以加个判断