function addBanner(pos,x,y,arImg,arHref)
{
	if(pos=="center")
	{
		if(screen.width==1024)
			x+=112;
		else if(screen.width==1280)
			x+=240;
	}
	else if(pos=="right")
	{
		if(screen.width==1024)
			x+=224;
		else if(screen.width==1280)
			x+=480;
	}
			
	index=getRandom(arImg.length);
	if(arHref.length<=index)
		document.write("<div style=position:relative;left:"+x+";top:"+y+";><img src="+arImg[index]+"></div>");
	else if(document.all)
		document.write("<div style='position:absolute;left:"+x+";top:"+y+";zIndex:23'><a href='"+arHref[index]+"'><img src="+arImg[index]+" border=0></a></div>");
	else if(document.layers)
		document.write("<layer position=absolute left="+x+" top="+y+"><a href='"+arHref[index]+"'><img src="+arImg[index]+" border=0></a></layer>");
}

function getRandom(index)
{
	while(1)
	{
		num=Math.random()*100;
		if(num<index)
			return Math.floor(num);
	}
}