定义层的位置:
<div id="menu" style="position: absolute; left: 532; top: 120; width: 79; height: 176; z-index: 2; background-color: #D7EBFF; layer-background-color: #999966; visibility: hidden; border: 1px none #000000" >
...
</div>
其中left: 532; top: 120;是可以调整的