<span>Test1</span>
<span>Test2</span>
<span ComponentID="M1"><IMG src="http://www.iecn.net/forum/images/iecn/logo.gif" border=0></span>
<span>Test3</span>
<span ComponentID="M2"><IMG src="http://ads.bootchina.com/upfile/2005118182213.GIF" border=0></span>
<span>Test4</span>
<span>Test5</span>
<span ComponentID="M3"><IMG src="http://bbs.51js.com/images/default/logo.gif" border=0></span>
<script language="javascript" defer>
function DoStartFand() {
var oSpanArr = document.getElementsByTagName('SPAN');
for ( var i=0; i<oSpanArr.length; i++ )
{
switch(oSpanArr[i].ComponentID)
{
case "M1" :
alert("ComponentID值为M1时,Span索引值为："+i);
oSpanArr[i].style.display="none";break;//*
case "M2":
alert("ComponentID值为M2时,Span索引值为："+i);
oSpanArr[i].innerHTML="无梦寒";break;//*
case "M3":
alert("ComponentID值为M3时,Span索引值为："+i);
oSpanArr[i].innerHTML="QQ：281198276";break;//*
 }
}
}
</script>
<A href="#" onclick="DoStartFand();return false"> 开始遍历Span标记 </a>