function showLogo(obj){
		if (obj=="c1") {
			document.getElementById('logos').innerHTML = "<img src='assets/images/logos_4x4.gif' />"		
			}
		
		if (obj=="c2") {
			document.getElementById('logos').innerHTML = "<img src='assets/images/logos_atv.gif' />"	
			}
		
		if (obj=="c3") {
			document.getElementById('logos').innerHTML = "<img src='assets/images/logos_moto.gif' />"		
			}
		
	 	document.getElementById(obj).className = "selected"
		for(i=1; i<4; i++) {
			id=obj.substring(1,2)
			if (i!=obj) document.getElementById("c"+i).className = "";
		}
	}