1，css，js，img一个都不能少运行代码框
<style type="text/css"><!--.trans_img {filter:alpha(opacity=30,enabled=1) blendtrans(duration=1); border:0 solid black}--></style><script language=javascript> function transimg(obj,enable) { obj.filters.blendtrans.apply(); obj.filters[0].enabled=enable; obj.filters.blendtrans.play(); }</script><img src="/files/bpic/2006-6/3/066306055289672.gif" class="trans_img" onmouseover="transimg(this,0)" onmouseout="transimg(this,1)">
[ctrl+a 全部选择 提示：你可先修改部分代码，再按运行]2，js & img运行代码框
<script language="javascript"> nereidfadeobjects = new object();nereidfadetimers = new object();function nereidfade(object, destop, rate, delta){if (!document.all)return if (object != "[object]"){ file://do this so i can take a string too 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); }}</script><a href="http://www.cnbruce.com/" target="_blank"><img border="0" src="/files/bpic/2006-6/3/066306055278937.gif" onmouseout=nereidfade(this,50,10,5) onmouseover=nereidfade(this,100,10,5) style="filter: alpha(opacity=50) " border=0></a>
[ctrl+a 全部选择 提示：你可先修改部分代码，再按运行]3，用htc文件，不用js从而减轻工作量。
下载alpha.htc: http://www.cnbruce.com/js/alpha.htc
效果页查看：http://www.cnbruce.com/js/a.html 4，有点flash的味道，一闪而过。运行代码框
<script language=javascript type=text/javascript>function trains(id,text){document.all[id].innerhtml=' '+text}function trainpic(id,text){document.all[id].innerhtml='<img alt=" 鼠标实现图片的渐有渐无 " src="/files/bpic/2006-6/3/066306055499683.gif">'}function high(which2){theobject=which2;theobject.filters.alpha.opacity=0highlighting=setinterval("highlightit(theobject)",50)}function low(which2){clearinterval(highlighting)which2.filters.alpha.opacity=100}function highlightit(cur2){if (cur2.filters.alpha.opacity<100)cur2.filters.alpha.opacity+=15else if(window.highting)clearinterval(highlighting)}</script><a href="http://www.cnbruce.com/"><img onmouseover="this.style.filter='alpha(opacity=100)';high(this)" onmouseout="low(this)" src="/files/bpic/2006-6/3/066306055289672.gif" border="0"></a>
[ctrl+a 全部选择 提示：你可先修改部分代码，再按运行]5，还有图片的“黑白转彩色”运行代码框
<script>function dotrans(filtercode) {imgobj.filters[0].apply();oimg.style.filter = filtercodeimgobj.filters[0].play();}</script><span id=imgobj onmouseleave='dotrans("gray")' style="filter: progid:dximagetransform.microsoft.fade(overlap=1.00); width: 1px" onmouseenter='dotrans("")'><img id=oimg style="filter: gray" src="/files/bpic/2006-6/3/066306055289672.gif"> </span>
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