the picture was replaced when the mouse move over the picture.

<script type="text/JavaScript">    //换图片    function changeImg(){      var img=document.getElementById("img2");           img.src= "button/query_1.gif";     }     function changeImgBack(){        var img=document.getElementById("img2");           img.src= "button/query.gif";     }   </script>

  <input type="Image" id="img2" name="Submit" src="button/query.gif" οnmοuseοver="changeImg()" οnmοuseοut="changeImgBack()" align="middle"/>