高手来看看

......<script language="JavaScript" >
function aaa(){
document.all.imgmap.src="images/index-map_07.jpg";
}
</script></head>
<body bgcolor="#DFFFDF" link="#000000" vlink="#000000" alink="#000000" >
<div id="mapframe" style="position:absolute;left:0px;top:49px;height:522px;width:612px;overflow:hidden;background-color:#99FFFF;layer-background-color:#99FFFF;border:1px #339933 solid">  <img id="imgmap" galleryimg="false" style="position:absolute;left:0px;top:-1px;height:520px;width:610px;cursor:default"></div> <input type="button" name="aaaa" value="aaaa" onClick="aaa()">
<tr>  </tr></body></html>你写错了关键字
fuction---> function