ID必需是唯一的﹐如果你有很多這樣的箭頭就不要用ID﹐改用name吧<img src="up.gif" name=jiantou>
<img src="down.gif" name=jiantou1>
<img src="up.gif" name=jiantou>
<img src="down.gif" name=jiantou1>
<Script language=javascript>
function chang(){
var imgUp=document.getElementsByName('jiantou');
for (var i=0;i<imgUp.length;i++)imgUp[i].style.display='none';
var imgDown=document.getElementsByName('jiantou1');
for (var i=0;i<imgDown.length;i++)imgDown[i].style.display='none';
}
window.onload=setTimeout("chang()",1000);
</script>
<img src="down.gif" name=jiantou1>
<img src="up.gif" name=jiantou>
<img src="down.gif" name=jiantou1>
<Script language=javascript>
function chang(){
var imgUp=document.getElementsByName('jiantou');
for (var i=0;i<imgUp.length;i++)imgUp[i].style.display='none';
var imgDown=document.getElementsByName('jiantou1');
for (var i=0;i<imgDown.length;i++)imgDown[i].style.display='none';
}
window.onload=setTimeout("chang()",1000);
</script>
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