function preloadImages()
{
	bicona=new Array();
	biconb=new Array();


	for(i=1 ; i<7 ;i++)
	{
		bicona[i]=new Image();
		bicona[i].src="images/0" + i + "a.gif";
		biconb[i]=new Image();
		biconb[i].src="images/0" + i + "b.gif";
	}	
		bicona[9]=new Image();
		bicona[9].src="images/0" + 9 + "a.gif";
		biconb[9]=new Image();
		biconb[9].src="images/0" + 9 + "b.gif";
}


function LinkI(n){
	document.images['btn0'+n].src=biconb[n].src;
}
function LinkO(n){
	document.images['btn0'+n].src=bicona[n].src;
}