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广告条随滚动条的移动而移动

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文章来源:蓝色理想

<html>
<head>
<title>跟随滚动条的图片</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<STYLE media=screen type=text/css>
#floater {
         POSITION: absolute; VISIBILITY: visible; WIDTH: 10px; Z-INDEX: 10
          }
//不知道为什么要定义floater为样式表!
</STYLE>


<script language="javascript">
<!--
function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);
// -->
</script>
</head>

<body bgcolor="#FFFFFF" text="#000000" >
<div id="floater" style="position:absolute; left:436px; top:60px; width:152px; height:178px; z-index:12"><img border=0 src="


<SCRIPT language=javascript>
     self.onError=null;
     currentX = currentY = 0;
     whichIt = null;
     lastScrollX = 0; lastScrollY = 0;
     NS = (document.layers) ? 1 : 0;
     IE = (document.all) ? 1: 0;
     <!-- STALKER CODE -->
     function heartBeat() {
         if(IE) { diffY = document.body.scrollTop; diffX = document.body.scrollLeft; }
     if(NS) { diffY = self.pageYOffset; diffX = self.pageXOffset; }
         if(diffY != lastScrollY) {
     percent = .1 * (diffY - lastScrollY);
     if(percent > 0) percent = Math.ceil(percent);
     else percent = Math.floor(percent);
                     if(IE) document.all.floater.style.pixelTop += percent;
                     if(NS) document.floater.top += percent;
     lastScrollY = lastScrollY + percent;
     }
         if(diffX != lastScrollX) {
             percent = .1 * (diffX - lastScrollX);
             if(percent > 0) percent = Math.ceil(percent);
             else percent = Math.floor(percent);
             if(IE) document.all.floater.style.pixelLeft += percent;
             if(NS) document.floater.left += percent;
             lastScrollX = lastScrollX + percent;
         }   
     }
     <!-- /STALKER CODE -->
     <!-- DRAG DROP CODE   鼠标拖放事件-->
     function checkFocus(x,y) {
     stalkerx = document.floater.pageX;
     stalkery = document.floater.pageY;
     stalkerwidth = document.floater.clip.width;
     stalkerheight = document.floater.clip.height;
     if( (x > stalkerx && x < (stalkerx+stalkerwidth)) && (y > stalkery && y < (stalkery+stalkerheight))) return true;
     else return false;
     }
     function grabIt(e) {
         if(IE) {
             whichIt = event.srcElement;
             while (whichIt.id.indexOf("floater") == -1) {
                 whichIt = whichIt.parentElement;


                 if (whichIt == null) { return true; }
         }
             whichIt.style.pixelLeft = whichIt.offsetLeft;
         whichIt.style.pixelTop = whichIt.offsetTop;
             currentX = (event.clientX + document.body.scrollLeft);
             currentY = (event.clientY + document.body.scrollTop);    
         } else {
     window.captureEvents(Event.MOUSEMOVE);
     if(checkFocus (e.pageX,e.pageY)) {
     whichIt = document.floater;
     StalkerTouchedX = e.pageX-document.floater.pageX;
     StalkerTouchedY = e.pageY-document.floater.pageY;
     }
         }
     return true;
     }
     function moveIt(e) {
         if (whichIt == null) { return false; }
         if(IE) {
         newX = (event.clientX + document.body.scrollLeft);
         newY = (event.clientY + document.body.scrollTop);
         distanceX = (newX - currentX); distanceY = (newY - currentY);
         currentX = newX; currentY = newY;
         whichIt.style.pixelLeft += distanceX;
         whichIt.style.pixelTop += distanceY;
             if(whichIt.style.pixelTop < document.body.scrollTop) whichIt.style.pixelTop = document.body.scrollTop;
             if(whichIt.style.pixelLeft < document.body.scrollLeft) whichIt.style.pixelLeft = document.body.scrollLeft;
             if(whichIt.style.pixelLeft > document.body.offsetWidth - document.body.scrollLeft - whichIt.style.pixelWidth - 20) whichIt.style.pixelLeft = document.body.offsetWidth - whichIt.style.pixelWidth - 20;
             if(whichIt.style.pixelTop > document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5) whichIt.style.pixelTop = document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5;
             event.returnValue = false;
         } else {
             whichIt.moveTo(e.pageX-StalkerTouchedX,e.pageY-StalkerTouchedY);
     if(whichIt.left < 0+self.pageXOffset) whichIt.left = 0+self.pageXOffset;
     if(whichIt.top < 0+self.pageYOffset) whichIt.top = 0+self.pageYOffset;
     if( (whichIt.left + whichIt.clip.width) >= (window.innerWidth+self.pageXOffset-17)) whichIt.left = ((window.innerWidth+self.pageXOffset)-whichIt.clip.width)-17;
     if( (whichIt.top + whichIt.clip.height) >= (window.innerHeight+self.pageYOffset-17)) whichIt.top = ((window.innerHeight+self.pageYOffset)-whichIt.clip.height)-17;
     return false;
         }
     return false;
     }
     function dropIt() {
         whichIt = null;
     if(NS) window.releaseEvents (Event.MOUSEMOVE);
     return true;
     }
     <!-- DRAG DROP CODE 鼠标拖放事件-->
     if(NS) {
         window.captureEvents(Event.MOUSEUP|Event.MOUSEDOWN);
         window.onmousedown = grabIt;
         window.onmousemove = moveIt;
         window.onmouseup = dropIt;
     }
     if(IE) {
         document.onmousedown = grabIt;
         document.onmousemove = moveIt;
         document.onmouseup = dropIt;
     }
     if(NS || IE) action = window.setInterval("heartBeat()",1);
</SCRIPT>

 

 

 

 

 


<font size="7" color="#FF0000">跟随滚动条的图片</font><br>
<font size="4" color="#FF0000">(跟随滚动的图层名字:floater,必须使用该名称才有,跟随滚动,以及拖放属性) </font><br>

 

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</body>  
</html>

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