function flip(pic, r) 
{ 
	if(r == 2) 
	{ 
		source = eval(pic + "2.src"); 
		document[pic].src = source; 
	} 
	if(r == 1) 
	{ 
		source = eval(pic + "1.src"); 
		document[pic].src = source; 
	} 
}

function link()
{
}