var brOK=false;  //这是图标飘动的程序
var mie=false;
var aver=parseInt(navigator.appVersion.substring(0,1));
var aname=navigator.appName;

function checkbrOK()
{if(aname.indexOf("Internet Explorer")!=-1)
   {if(aver>=4) brOK=navigator.javaEnabled();
    mie=true;
   }
 if(aname.indexOf("Netscape")!=-1)  
   {if(aver>=4) brOK=navigator.javaEnabled();}
}

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-20;
     pageY=window.pageYOffset;
     pageH=window.innerHeight-20;
    }
   else
    {pageX=window.document.body.scrollLeft;
     pageW=window.document.body.offsetWidth-20;
     pageY=window.document.body.scrollTop;
     pageH=window.document.body.offsetHeight-20;
    } 

   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(document.layers)
      {eval('document.'+chip.named+'.top ='+chip.yy);
       eval('document.'+chip.named+'.left='+chip.xx);
      } 
   else if (document.all)
      {eval('document.all.'+chip.named+'.style.pixelLeft='+chip.xx);
       eval('document.all.'+chip.named+'.style.pixelTop ='+chip.yy); 
      }
   else if (document.getElementById)
      {document.getElementById(chip.named).style.left=chip.xx;
       document.getElementById(chip.named).style.top =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)}
  }
}
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
   }
}

<!--
function MM_findObj(n, d) { //这是打开下拉菜单的子程序
  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); return x;
}
function MM_showHideLayers() { //这是打开下拉菜单的主程序
  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; }
}
//-->

<!-- //只是变换下拉菜单颜色的程序
function mOvr(src,clrOver) { if (!src.contains(event.fromElement)) { src.style.cursor = 'hand'; src.bgColor = clrOver; }}
function mOut(src,clrIn) { if (!src.contains(event.toElement)) { src.style.cursor = 'default'; src.bgColor = clrIn; }}
//---->

<!--
function OpenNewWin(filename,w,h){
  OpenWin = window.open (filename,'','width='+w+',height='+h+',menubar=no,directories=no,statusbar=no,toolbar=no,resize=no,scrollbars=no')
}
function OpenNewWindow(filename,w,h){
  OpenWin = window.open (filename,'','width='+w+',height='+h+',menubar=no,directories=no,statusbar=no,toolbar=no,resize=no,scrollbars=yes'+',left=150,top=120')
}
function FavorAdd(){ 
url = "http://www.vicson.com"; //你自己的主页地址 
title = "伟诚科技有限公司"; //你自己的主页名称 
window.external.AddFavorite(url,title); 
}
function FavorAdd_Eng(){ 
url = "http://www.vicson.com/Documents/English/Index.htm"; //你自己的主页地址 
title = "Vicson Technology"; //你自己的主页名称 
window.external.AddFavorite(url,title); 
}
-->