function prima()
{document.getElementById('casuta').innerHTML=document.getElementById('cas1').innerHTML;}
function casuta(id) 
{		
		document.getElementById('but1').className = "buton-casuta";
		document.getElementById('but2').className = "buton-casuta";
		document.getElementById('but3').className = "buton-casuta";
		document.getElementById('but'+id).className = "buton-casuta-select";
		document.getElementById('casuta').innerHTML=document.getElementById('cas'+id).innerHTML;	

}