自由飘浮的图像图形特效__脚本特效_后台技术飞飞Asp技术乐园

自由飘浮的图像

时间： 2007-10-04 09:16:32　阅读次数：2812

<html>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>网页特效|www.ffasp.com 飞飞Asp乐园|---屏幕上自由飘浮的图像</title>

</head>

<body>
<center>

<script language="javascript">
window.onload=netease;
var brOK=false;
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;
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)}
}
}
var netease;
var chip;
function netease()
{checkbrOK(); 
netease=new Chip("netease",60,80);
if(brOK) 
{ movechip("netease");
}
}
</script>
<div id="netease" style="POSITION: absolute; left:10; top:15"><a
href="#" target="_blank">
<dd>
<img border="0" src="/imagesjs/k0212.gif" ></a></dd>
</div>

<table border="0" cellPadding="2" width="648">
  <tr align="middle">
    <td class="cur" height="18" width="640"><font COLOR="#000000" face="黑体" size="5">屏幕上自由飘浮的图像</font></td>
  </tr>
</table>

<table width="66%" height="147">
  <tr>
    <td width="78%" bgcolor="#FFFF00" height="106"><font face="仿宋_GB2312"
    size="3">   
    经常在网上见到屏幕自由飘浮的的图片吧，从一侧飘悠到另一侧，碰到边框后在返回，这种自由飘浮的的图片现在似乎很时髦，随便打开搜狐、网易等网站都可以见到网页上飘摇而过的图片，想知道怎么做的吗，很简单，这就是图层移动的效果，现在，你也可以轻松做到，仅用短短的一段代码，就实现了以上效果！</font></td>
  </tr>
  <tr>
  </tr>
</table>

提示：您可以先修改部分代码再运行