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javascript图片渐显效果代码

2008-05-27 00:00 399 查看
在<head>到</head>之间插入如下的J***ASCRIPT代码:


nereidFadeObjects = new Object();
nereidFadeTimers = new Object();
function nereidFade(object, destOp, rate, delta){
if (!document.all)
return
if (object != "[object]"){
setTimeout("nereidFade("+object+","+destOp+","+rate+","+delta+")",0);
return;
}
clearTimeout(nereidFadeTimers[object.sourceIndex]);
diff = destOp-object.filters.alpha.opacity;
direction = 1;
if (object.filters.alpha.opacity > destOp){
direction = -1;
}
delta=Math.min(direction*diff,delta);
object.filters.alpha.opacity+=direction*delta;
if (object.filters.alpha.opacity != destOp){
nereidFadeObjects[object.sourceIndex]=object;
nereidFadeTimers[object.sourceIndex]=setTimeout("nereidFade(nereidFadeObjects["+object.sourceIndex+"],"+destOp+","+rate+","+delta+")",rate);
}
}

在要插入的图片添加如下代码:




[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]
*其中onMouseOver=nereidFade(this,50,10,4)中 style="FILTER: alpha(opacity=50)"表示图片的透明度为50%
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