function openurl(url) {
	document.location.href=url;
}

function setbox(id) {
	document.getElementById('box1').style.display="none";
	document.getElementById('box2').style.display="none";
	document.getElementById('box3').style.display="none";
	document.getElementById('box4').style.display="none";
	document.getElementById('box1_link').setAttribute("class", "");
	document.getElementById('box2_link').setAttribute("class", "");
	document.getElementById('box3_link').setAttribute("class", "");
	document.getElementById('box4_link').setAttribute("class", "");
	document.getElementById('box1_link').setAttribute("className", "");
	document.getElementById('box2_link').setAttribute("className", "");
	document.getElementById('box3_link').setAttribute("className", "");
	document.getElementById('box4_link').setAttribute("className", "");
	document.getElementById(id).style.display="block";
	document.getElementById(id+'_link').setAttribute("class", "selected");
	document.getElementById(id+'_link').setAttribute("className", "selected");
}