怎么取得标签，然后触发事件后改变标签的属性值？
<body>
<a href="javascript:void(0)"><img src="http://img3.nst.gif" id="star1" alt="图片" onmousemove="ImgOnMouseMove()"/></a>
</body>
鼠标滑动过图片位置时，改变src的值。这个ImgOnMouseMove这个函数该怎么写呢？求教！！！
<body>
<a href="javascript:void(0)"><img src="http://img3.nst.gif" id="star1" alt="图片" onmousemove="ImgOnMouseMove()"/></a>
</body>
鼠标滑动过图片位置时，改变src的值。这个ImgOnMouseMove这个函数该怎么写呢？求教！！！
<img src="images/p001.jpg" onmouseover="this.src='images/p002.jpg'" onmouseout="this.src='images/p001.jpg'" />
</a>
或者
<a href="javascript:void(0)">
<img src="images/p001.jpg" onmouseover="ImgOnMouseMove(this)" />
</a> <script type="text/javascript">
function ImgOnMouseMove(obj){
obj.src="images/p002.jpg"
}
</script>
<script type="text/javascript"> function OnMouseMove(o){ obj.src="images/p002.jpg"
} </script>
<a href="javascript:void(0)">
<img src="images/p001.jpg" onmouseover="OnMouseMove(this)" />
</a>