如何利用JAVASCRIPT實現浮動廣告

最後更新：2018-12-07 來源：互聯網

上載者：User

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

<HTML><HEAD><TITLE>21CN.COM - 世紀郵箱</TITLE>
<META http-equiv=Content-Type content="text/html; charset=gb2312">

<SCRIPT language=JavaScript>
var brOK=false;
var mie=false;
var aver=parseInt(navigator.appVersion.substring(0,1));
var aname=navigator.appName;

var vmin=2;
var vmax=5;
var vr=2;
var timer1;

function Chip(chipname,width,height)
{this.named=chipname;
this.vx=vmin+vmax*Math.random();
this.vy=vmin+vmax*Math.random();
this.w=width;
this.h=height;
this.xx=0;
this.yy=0;
this.timer1=null;
}

function movechip(chipname)
{
if(brOK)
{eval("chip="+chipname);
   if(!mie)
    {pageX=window.pageXOffset;
     pageW=window.innerWidth;
     pageY=window.pageYOffset;
     pageH=window.innerHeight;
    }
   else
    {pageX=window.document.body.scrollLeft;
     pageW=window.document.body.offsetWidth-8;
     pageY=window.document.body.scrollTop;
     pageH=window.document.body.offsetHeight;
    }

   chip.xx=chip.xx+chip.vx;
   chip.yy=chip.yy+chip.vy;

   chip.vx+=vr*(Math.random()-0.5);
   chip.vy+=vr*(Math.random()-0.5);
   if(chip.vx>(vmax+vmin)) chip.vx=(vmax+vmin)*2-chip.vx;
   if(chip.vx<(-vmax-vmin)) chip.vx=(-vmax-vmin)*2-chip.vx;
   if(chip.vy>(vmax+vmin)) chip.vy=(vmax+vmin)*2-chip.vy;
   if(chip.vy<(-vmax-vmin)) chip.vy=(-vmax-vmin)*2-chip.vy;

   if(chip.xx<=pageX)
     {chip.xx=pageX;
      chip.vx=vmin+vmax*Math.random();
     }
   if(chip.xx>=pageX+pageW-chip.w)
     {chip.xx=pageX+pageW-chip.w;
      chip.vx=-vmin-vmax*Math.random();
     }
   if(chip.yy<=pageY)
     {chip.yy=pageY;
      chip.vy=vmin+vmax*Math.random();
     }
   if(chip.yy>=pageY+pageH-chip.h)
     {chip.yy=pageY+pageH-chip.h;
      chip.vy=-vmin-vmax*Math.random();
     }

   if(!mie)
      {eval('document.'+chip.named+'.top ='+chip.yy);
       eval('document.'+chip.named+'.left='+chip.xx);
      }
   else
      {eval('document.all.'+chip.named+'.style.pixelLeft='+chip.xx);
       eval('document.all.'+chip.named+'.style.pixelTop ='+chip.yy);
      }
   chip.timer1=setTimeout("movechip('"+chip.named+"')",100);
}
}

function stopme(chipname)
{if(brOK)
{//alert(chipname)
   eval("chip="+chipname);
   if(chip.timer1!=null)
    {clearTimeout(chip.timer1)}
}
}
</SCRIPT>

<SCRIPT>
<!--
var chip1;
//add or delete more variables, depending on how many images you're using

function pagestart()
{checkbrOK();
chip1=new Chip("chip1",60,80);
//add or delete more of the above, depending on how many images you're using
if(brOK)
   { movechip("chip1");
     //add or delete more of the above, depending on how many images you're using
   }
}
//-->
</SCRIPT>

<META content="MSHTML 6.00.2600.0" name=GENERATOR></HEAD>

</BODY></HTML>

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