可拖动窗口，附带鼠标控制渐变透明，开启关闭功能

<style type="text/css">
<!--
#Layer1 {
 position:absolute;
 width:210px;
 height:160px;
 z-index:1;
 left: 178px;
 top: 322px;
 background-color: #FFFBF0;
}
#content {
 position:absolute;
 width:200px;
 height:115px;
 z-index:1;
 left: 0px;
 top: 27px;
 border: 1px solid #666666;
}
#bar {
 position:absolute;
 width:200px;
 height:25px;
 z-index:2;
 background-color: #00FF33;
 left: 0px;
 top: 0px;
}
#but_1 {
 position:absolute;
 width:14px;
 height:14px;
 z-index:3;
 left: 183px;
 top: 6px;
 overflow: hidden;
 background-color: #333333;
}
#but_2 {
 position:absolute;
 width:10px;
 height:10px;
 z-index:4;
 left: 164px;
 top: 6px;
 background-color: #00FF33;
 border: 2px solid #666666;
 overflow: hidden;
}
-->
</style>
<script type="text/JavaScript">
<!--
function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_scanStyles(obj, prop) { //v8.0
  var inlineStyle = null; var ccProp = prop; var dash = ccProp.indexOf("-");
  while (dash != -1){ccProp = ccProp.substring(0, dash) + ccProp.substring(dash+1,dash+2).toUpperCase() + ccProp.substring(dash+2); dash = ccProp.indexOf("-");}
  inlineStyle = eval("obj.style." + ccProp);
  if(inlineStyle) return inlineStyle;
  var ss = document.styleSheets;
  for (var x = 0; x < ss.length; x++) { var rules = ss[x].cssRules;
 for (var y = 0; y < rules.length; y++) { var z = rules[y].style;
   if(z[prop] && (rules[y].selectorText == '*[ID"' + obj.id + '"]')) {
        return z[prop];
  }  }  }  return "";
}

function MM_getProp(obj, prop) { //v8.0
  if (!obj) return ("");
  if (prop == "L") return obj.offsetLeft;
  else if (prop == "T") return obj.offsetTop;
  else if (prop == "W") return obj.offsetWidth;
  else if (prop == "H") return obj.offsetHeight;
  else {
    if (typeof(window.getComputedStyle) == "undefined") {
     if (typeof(obj.currentStyle) == "undefined"){
      if (prop == "P") return MM_scanStyles(obj,"position");
        else if (prop == "Z") return MM_scanStyles(obj,"z-index");
        else if (prop == "V") return MM_scanStyles(obj,"visibility");
     } else {
       if (prop == "P") return obj.currentStyle.position;
        else if (prop == "Z") return obj.currentStyle.zIndex;
        else if (prop == "V") return obj.currentStyle.visibility;
     }
    } else {
     if (prop == "P") return window.getComputedStyle(obj,null).getPropertyValue("position");
      else if (prop == "Z") return window.getComputedStyle(obj,null).getPropertyValue("z-index");
      else if (prop == "V") return window.getComputedStyle(obj,null).getPropertyValue("visibility");
    }
  }
}

function MM_dragLayer(objName,x,hL,hT,hW,hH,toFront,dropBack,cU,cD,cL,cR,targL,targT,tol,dropJS,et,dragJS) { //v8.0
  //Copyright 2005 Macromedia, Inc. All rights reserved.
  var i,j,aLayer,retVal,curDrag=null,curLeft,curTop,IE=document.all,NS4=document.layers;
  var NS6=(!IE&&document.getElementById), NS=(NS4||NS6); if (!IE && !NS) return false;
  retVal = true; if(IE && event) event.returnValue = true;
  if (MM_dragLayer.arguments.length > 1) {
    curDrag = MM_findObj(objName); if (!curDrag) return false;
    if (!document.allLayers) { document.allLayers = new Array();
      with (document) if (NS4) { for (i=0; i<layers.length; i++) allLayers[i]=layers[i];
        for (i=0; i<allLayers.length; i++) if (allLayers[i].document && allLayers[i].document.layers)
          with (allLayers[i].document) for (j=0; j<layers.length; j++) allLayers[allLayers.length]=layers[j];
      } else {
        if (NS6) { var spns = getElementsByTagName("span"); var all = getElementsByTagName("div");
          for (i=0;i<spns.length;i++) if (MM_getProp(spns[i],'P')) allLayers[allLayers.length]=spns[i];}
        for (i=0;i<all.length;i++) {
   if (NS4){if (all[i].style&&all[i].style.position) allLayers[allLayers.length]=all[i];}
          else if (MM_getProp(all[i],'P')) allLayers[allLayers.length]=all[i];
        }
    } }
    curDrag.MM_dragOk=true; curDrag.MM_targL=targL; curDrag.MM_targT=targT;
    curDrag.MM_tol=Math.pow(tol,2); curDrag.MM_hLeft=hL; curDrag.MM_hTop=hT;
    curDrag.MM_hWidth=hW; curDrag.MM_hHeight=hH; curDrag.MM_toFront=toFront;
    curDrag.MM_dropBack=dropBack; curDrag.MM_dropJS=dropJS;
    curDrag.MM_everyTime=et; curDrag.MM_dragJS=dragJS;

    curDrag.MM_oldZ = (NS4)?curDrag.zIndex:MM_getProp(curDrag,'Z');
    curLeft= (NS4)?curDrag.left:MM_getProp(curDrag,'L');
    if (String(curLeft)=="NaN") curLeft=0; curDrag.MM_startL = curLeft;
    curTop = (NS4)?curDrag.top:MM_getProp(curDrag,'T');
    if (String(curTop)=="NaN") curTop=0; curDrag.MM_startT = curTop;
    curDrag.MM_bL=(cL<0)?null:curLeft-cL; curDrag.MM_bT=(cU<0)?null:curTop-cU;
    curDrag.MM_bR=(cR<0)?null:curLeft+cR; curDrag.MM_bB=(cD<0)?null:curTop+cD;
    curDrag.MM_LEFTRIGHT=0; curDrag.MM_UPDOWN=0; curDrag.MM_SNAPPED=false; //use in your JS!
    document.onmousedown = MM_dragLayer; document.onmouseup = MM_dragLayer;
    if (NS) document.captureEvents(Event.MOUSEDOWN|Event.MOUSEUP);
  } else {
    var theEvent = ((NS)?objName.type:event.type);
    if (theEvent == 'mousedown') {
      var mouseX = (NS)?objName.pageX : event.clientX + document.body.scrollLeft;
      var mouseY = (NS)?objName.pageY : event.clientY + document.body.scrollTop;
      var maxDragZ=null; document.MM_maxZ = 0;
      for (i=0; i<document.allLayers.length; i++) { aLayer = document.allLayers[i];
        var aLayerZ = (NS4)?aLayer.zIndex:MM_getProp(aLayer,'Z');
        if (aLayerZ > document.MM_maxZ) document.MM_maxZ = aLayerZ;
        var isVisible = ((NS4)?aLayer.visibility:MM_getProp(aLayer,'V')).indexOf('hid') == -1;
        if (aLayer.MM_dragOk != null && isVisible) with (aLayer) {
          var parentL=0; var parentT=0;
          if (NS6) { parentLayer = aLayer.parentNode;
            while (parentLayer != null && parentLayer != document && MM_getProp(parentLayer,'P')) {
              parentL += parseInt(MM_getProp(parentLayer,'L')); parentT += parseInt(MM_getProp(parentLayer,'T'));
              parentLayer = parentLayer.parentNode;
              if (parentLayer==document) parentLayer = null;
          } } else if (IE) { parentLayer = aLayer.parentElement;      
            while (parentLayer != null && MM_getProp(parentLayer,'P')) {
              parentL += MM_getProp(parentLayer,'L'); parentT += MM_getProp(parentLayer,'T');
              parentLayer = parentLayer.parentElement; } }
          var tmpX=mouseX-((NS4)?pageX:(MM_getProp(aLayer,'L'))+parentL+MM_hLeft);
          var tmpY=mouseY-((NS4)?pageY:(MM_getProp(aLayer,'T'))+parentT+MM_hTop);
          if (String(tmpX)=="NaN") tmpX=0; if (String(tmpY)=="NaN") tmpY=0;
          var tmpW = MM_hWidth;  if (tmpW <= 0) tmpW += (NS4)?clip.width:MM_getProp(aLayer,'W');
          var tmpH = MM_hHeight; if (tmpH <= 0) tmpH += (NS4)?clip.height:MM_getProp(aLayer,'H');
          if ((0 <= tmpX && tmpX < tmpW && 0 <= tmpY && tmpY < tmpH) && (maxDragZ == null
              || maxDragZ <= aLayerZ)) { curDrag = aLayer; maxDragZ = aLayerZ; } } }
      if (curDrag) {
        document.onmousemove = MM_dragLayer; if (NS4) document.captureEvents(Event.MOUSEMOVE);
        curLeft = (NS4)?curDrag.left:MM_getProp(curDrag,'L');
        curTop = (NS4)?curDrag.top:MM_getProp(curDrag,'T');
        if (String(curLeft)=="NaN") curLeft=0; if (String(curTop)=="NaN") curTop=0;
        MM_oldX = mouseX - curLeft; MM_oldY = mouseY - curTop;
        document.MM_curDrag = curDrag;  curDrag.MM_SNAPPED=false;
        if(curDrag.MM_toFront) {
          var newZ = parseInt(document.MM_maxZ)+1;
          eval('curDrag.'+((NS4)?'':'style.')+'zIndex=newZ');
          if (!curDrag.MM_dropBack) document.MM_maxZ++; }
        retVal = false; if(!NS4&&!NS6) event.returnValue = false;
    } } else if (theEvent == 'mousemove') {
      if (document.MM_curDrag) with (document.MM_curDrag) {
        var mouseX = (NS)?objName.pageX : event.clientX + document.body.scrollLeft;
        var mouseY = (NS)?objName.pageY : event.clientY + document.body.scrollTop;
        var newLeft = mouseX-MM_oldX; var newTop  = mouseY-MM_oldY;
        if (MM_bL!=null) newLeft = Math.max(newLeft,MM_bL);
        if (MM_bR!=null) newLeft = Math.min(newLeft,MM_bR);
        if (MM_bT!=null) newTop  = Math.max(newTop ,MM_bT);
        if (MM_bB!=null) newTop  = Math.min(newTop ,MM_bB);
        MM_LEFTRIGHT = newLeft-MM_startL; MM_UPDOWN = newTop-MM_startT;
        if (NS4) {left = newLeft; top = newTop;}
        else if (NS6){style.left = newLeft + "px"; style.top = newTop + "px";}
        else {style.pixelLeft = newLeft; style.pixelTop = newTop;}
        if (MM_dragJS) eval(MM_dragJS);
        retVal = false; if(!NS) event.returnValue = false;
    } } else if (theEvent == 'mouseup') {
      document.onmousemove = null;
      if (NS) document.releaseEvents(Event.MOUSEMOVE);
      if (NS) document.captureEvents(Event.MOUSEDOWN); //for mac NS
      if (document.MM_curDrag) with (document.MM_curDrag) {
        if (typeof MM_targL =='number' && typeof MM_targT == 'number' &&
            (Math.pow(MM_targL-((NS4)?left:MM_getProp(document.MM_curDrag,'L')),2)+
             Math.pow(MM_targT-((NS4)?top:MM_getProp(document.MM_curDrag,'T')),2))<=MM_tol) {
          if (NS4) {left = MM_targL; top = MM_targT;}
          else if (NS6) {style.left = MM_targL + "px"; style.top = MM_targT + "px";}
          else {style.pixelLeft = MM_targL; style.pixelTop = MM_targT;}
          MM_SNAPPED = true; MM_LEFTRIGHT = MM_startL-MM_targL; MM_UPDOWN = MM_startT-MM_targT; }
        if (MM_everyTime || MM_SNAPPED) eval(MM_dropJS);
        if(MM_dropBack) {if (NS4) zIndex = MM_oldZ; else style.zIndex = MM_oldZ;}
        retVal = false; if(!NS) event.returnValue = false; }
      document.MM_curDrag = null;
    }
    if (NS) document.routeEvent(objName);
  } return retVal;
}
//-->
</script>

<script>
<!--
// code by windy_sk
var timer=null;
var org_opacity=30;
var step=5;
var ext_time=30;

function doit(img,mode){
  clearTimeout(timer);
  if(img.style.filter.indexOf("alpha")==-1)img.style.filter+="alpha(opacity="+org_opacity+")";
  var cur_level=img.filters.alpha.opacity;
  if(mode){
    cur_level+=step;
    if(cur_level>100)cur_level=100;
  }else{
    cur_level-=step;
    if(cur_level<org_opacity)cur_level=org_opacity;
  }
  img.filters.alpha.opacity=cur_level;
  if(cur_level!=100 && cur_level!==ext_time)
    timer=setTimeout("doit("+img.id+","+mode+")",ext_time)
}

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}
//-->
</script>
</head>

<body onload="MM_dragLayer('Layer1','',0,0,0,0,true,false,-1,-1,-1,-1,false,false,0,'',false,'')">

<body bgcolor="#FFFBF0">

<div id="Layer1" style="filter: alpha(opacity=30)" onmouseover=doit(this,true) onmouseout=doit(this,false) >
  <div id="content"><img src="/UploadFiles/2021-04-02/logo.gif">  <div id="bar"></div>
  <div id="but_1" onclick="MM_showHideLayers('content','','show')"></div>
  <div id="but_2" onclick="MM_showHideLayers('content','','hide')"></div>
</div>