<html>
<script language="JavaScript" type="text/javascript">
function checkUrl(obj) {
window.alert(obj.document.getElementsByTagName("img")[0].src);
}
</script>
<div onclick="checkUrl(this);">
<a href="http://www.163.com" target="_blank">
<img src="images/logo_163.gif" border="0" >
</a>
</div>
</html>
<script language="JavaScript" type="text/javascript">
function checkUrl(obj) {
window.alert(obj.document.getElementsByTagName("img")[0].src);
}
</script>
<div onclick="checkUrl(this);">
<a href="http://www.163.com" target="_blank">
<img src="images/logo_163.gif" border="0" >
</a>
</div>
</html>
firefox下怎么不行啊!ie下可以的