高手帮帮忙，js问题

我想在我的页面的右下角实现一个浮动广告的效果，一直在右下角，随滚动条滚动。

解决方案 »

  1.   

    跟随屏幕移动的图像[推荐]修改图片名称和文字即可][共2步]====1、将以下代码加入到HEML的<head></head>之间：<style type="text/css">
    #floater {
    position: absolute;
    left: 500;
    top: 146;
    width: 125;
    visibility: visible;
    z-index: 10;
    }</style>====2、将以下代码加入到HEML的<body></body>之间<div ID="floater" style="left: 590px; top: 158px">
    <p align="center"><img SRC="想要显示的图片.gif" alt="图片显示的文字" WIDTH="125" HEIGHT="60"><br>
    <font color="#FF8040">图片下面的文字</font></p>
    </div><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 -->
    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 -->
    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>