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如何让页面逐渐缩小的代码

3089 2009/5/16
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>标题页</title>
<style>
    .mydiv{
    position:absolute;
    left:0;
    top:0;
    layer-background-color:white;
    background-color:white;
    border:0.1px solid white
    }
</style>
</head>
<body bgcolor="#000000">
<div id="div1" class="mydiv"></div>
<script language="JavaScript"> 
var speed=5                                                      //变小的速度
if (document.layers){                                           //ns浏览器的情况下
    var reference=window.innerWidth/window.innerHeight
    var temp=eval("document.div1.clip")
    temp.left=temp.top=0
    temp.right=window.innerWidth
    temp.bottom=window.innerHeight
}
else if (document.all){                                         //ie浏览器的情况下
    var reference=document.body.clientWidth/document.body.clientHeight
    var rightclip,leftclip,topclip,bottomclip                   //代表裁减区域的上下左右4个位置
    var temp=document.all.div1.style                            //div层的样式
    topclip=leftclip=0                                          //设置上下左右4个位置的初始值
    rightclip=temp.width=document.body.clientWidth
    bottomclip=temp.height=document.body.clientHeight
}
function rectDiv(){
window.scrollTo(0,0)                                           //窗体默认在开始(0,0)位置,左上角
if (document.layers){                                          //ns浏览器的情况下
    if (temp.left>window.innerWidth/2)
     clearInterval(stopit)                                   //停止缩小
    temp.left+=reference*speed//动态设置裁减的上下左右4个位置
    temp.top+=speed
    temp.right-=reference*speed
    temp.bottom-=speed
    }
else if (document.all){                                        //ie浏览器的情况下
    if (leftclip>document.body.clientWidth/2)
       clearInterval(stopit)                                    //停止缩小                                
    temp.clip="rect( "+topclip+" "+rightclip+" "+bottomclip+" "+leftclip+")" //裁减一个区域
    leftclip+=reference*speed                                                //动态设置裁减的上下左右4个位置
    topclip+=speed
    rightclip-=reference*speed
    bottomclip-=speed
    }
}
stopit=setInterval("rectDiv()",100)
</script>
</body>
</html>

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