function cardLook(num){
    
    if (document.getElementById){
			for(i=0;i<10;i++){
            document.getElementById("card"+i).style.visibility="hidden";
        }
            document.getElementById("card"+num).style.visibility="visible";
            return;
        } else {
			for(i=0;i<10;i++){
            document.all("card"+i).style.visibility="hidden";
        }
             document.all("card"+num).style.visibility="visible";
            return;
        }
    }