弹出隐藏子菜单

<li onmouseover="pand(this,'display');" onmouseout="pand(this,'hidden');">

<div id='small'>

asdfasdf

</div>

</li>

 

 

 

function pand(obj, cName) {
        switch (cName) {
            case 'display':
                obj.className = 'on';
                break;
            case 'hidden':
                obj.className = '';
                break;
        }
        var objNodes = obj.childNodes;
        for (var i = 0; i < objNodes.length; i++) {
            if (objNodes[i].id == 'small') {
                objNodes[i].className = cName;
                break;
            }
            else {
                continue;
            }
        }
           
    }