图片淡入淡出效果代码

<SCRIPT language=JavaScript>
var d=0
function JM_fade(ob){
if (d==0) {ob.filters.alpha.opacity+=1} else {ob.filters.alpha.opacity-=1}
if (ob.filters.alpha.opacity==100){d=1;} else if (ob.filters.alpha.opacity==0){d=0}
}
setInterval("JM_fade(u)",10)
</SCRIPT>
<IMG style="FILTER: alpha(opacity=0)" src="图片位置" name=u>