if(navigator.appVersion.substring(0,1)>=3)
	{
	bot0		=new Image();
	bot0.src	="images/btn1.gif";
	bot0p		=new Image();
	bot0p.src	="images/btn1x.gif";
	bot1		=new Image();
	bot1.src	="images/btn2.gif";
	bot1p		=new Image();
	bot1p.src	="images/btn2x.gif";
	bot2		=new Image();
	bot2.src	="images/btn3.gif";
	bot2p		=new Image();
	bot2p.src	="images/btn3x.gif";
	}

function CambiaImg(imgid,imgnew)
	{
	if(navigator.appVersion.substring(0,1)>=3)
		{
		document.images[imgid].src=eval(imgnew+".src");
		}
	}