function closeDiv()
{

	//Close all open boxes
	for(j=1; j<5; j++) {
		document.getElementById("box" + j).style.display="none";
		document.getElementById("link" + j).className = '';
	}

}

function showDiv(i)
{

	//Close all open boxes
	closeDiv();

	//Open the box
	document.getElementById("box" + i).style.display="block";
	document.getElementById("link" + i).className="aktiv";

}