JavaScript技巧_可拖动窗口,附带鼠标控制渐变透明,开启关闭功能

<script><br><!--<br/>// code by windy_sk<br/>var timer=null;<br/>var org_opacity=30;<br/>var step=5;<br/>var ext_time=30;</p><p>function doit(img,mode){<br/> clearTimeout(timer);<br/> if(img.style.filter.indexOf("alpha")==-1)img.style.filter+="alpha(opacity="+org_opacity+")";<br/> var cur_level=img.filters.alpha.opacity;<br/> if(mode){<br/> cur_level+=step;<br/> if(cur_level>100)cur_level=100;<br>  }else{<br>    cur_level-=step;<br>    if(cur_level<org_opacity)cur_level=org_opacity;<br/> }<br/> img.filters.alpha.opacity=cur_level;<br/> if(cur_level!=100 && cur_level!==ext_time)<br/> timer=setTimeout("doit("+img.id+","+mode+")",ext_time)<br/>}</p><p>function MM_showHideLayers() { //v6.0<br/> var i,p,v,obj,args=MM_showHideLayers.arguments;<br/> for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];<br/> if (obj.style) { obj=obj.style; v=(v==&#39;show&#39;)?&#39;visible&#39;:(v==&#39;hide&#39;)?&#39;hidden&#39;:v; }<br/> obj.visibility=v; }<br/>}<br/>//--><br></script>