<script language="javascript">
    function tab(tag, className, isDisplay) {
        var list = document.getElementsByTagName(tag);
        for (var i = 0,
        len = list.length; i < len; i++) {
            if (list[i].className == className) {
                if (isDisplay == 1) {
                    list[i].style.display = "block"
                } else {
                    list[i].style.display = "none"
                }
            }
        }
    }
</script>
</pre>
页面代码：
<pre lang="html" line="1" escaped="true">
<div style="float:left; position:relative">

##学校
<span class="bianh">
<a herf="#">[切换]</a></span>
<div style="position:absolute; left:40px;" onmousemove="tab('div','selectschool',1)" onclick="tab('div','selectschool',2)">
<a herf="#">中南民族大学</a>
<a herf="#">XXXX大学</a>
    </div>
</div>