加入如下代码到body区域
<script> function oMove(a1,a2) { layer1.style.visibility="visible"; layer2.style.visibility="visible"; var x=event.x; var y=event.y; if (y>0&&y<300) {a1.style.top =y;} if (x>200&&x<500) {a2.style.left =x; } } function hidden() { layer1.style.visibility="hidden"; layer2.style.visibility="hidden"; } </script> <div style="position:absolute;left:201;top:0;width:300;height:300;border:1px #ff9966 dashed" onmousemove="oMove(layer1,layer2)" onmouseout="hidden()"></div> <div id="layer1" style="position:absolute;left:200;top:200;visibility:hidden"><IMG src="2.gif"></div> <div id="layer2" style="position:absolute;left:200;top:0;visibility:hidden"><IMG src="1.gif"></div>

所用图片下载： .