var brOK=false;
var mie=false;
var vmin=2;
var vmax=5;
var vr=1;
var timer1;
var flyads;
//var isflash=0;				//是否为FLASH文件的漂浮 1=是 0=否

//var pic="http://images.chinaz.com/index_images/51web.gif";			//图片的地址
//var pic="http://images.chinaz.com/index_images/kete_PF.gif";			//图片的地址
//var alt="支持本站，请点击广告赞助商";	//鼠标放在图片上时显示的提示文字

//var url="http://www.51web.cn";		//图片链接的地址
//var flashurl="http://images.chinaz.com/index_images/xmf.swf";		//FLASH文件的路径

var Wimg=80;				//图像的宽度

var Himg=80;				//图像的高度

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.xx>=680)
		{
			chip.xx=chip.xx-20;
			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+"')",80);
	}
}

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

function flyads()
{
	if(navigator.appName.indexOf("Internet Explorer")!=-1)
	{
		if(parseInt(navigator.appVersion.substring(0,1))>=4) brOK=navigator.javaEnabled();mie=true;
	}
	if(navigator.appName.indexOf("Netscape")!=-1)
	{
		if(parseInt(navigator.appVersion.substring(0,1))>=4) brOK=navigator.javaEnabled();
	}
	flyads.named="flyads";
	flyads.vx=vmin+vmax*Math.random();
	flyads.vy=vmin+vmax*Math.random();
	flyads.w=1;
	flyads.h=1;
	flyads.xx=0;
	flyads.yy=0;
	flyads.timer1=null;
	movechip("flyads");
}

/*
document.write('<div id=flyads onmouseover=stopme(flyads); onmouseout=movechip(flyads); style=height:49px;left:178px;position:absolute;top:1237px;width:70px; z-index:1000>');

document.write("<a href='#' target=_blank>");
document.write("<img src='...' alt='...' border=0 width='100' height='100'></a>");

document.write("</div>");

flyads();


*/