function switch_display(id, activeLinkId, activePreviewId) {
	var linkList = document.getElementById(id);
	var linkItems = linkList.childNodes;

	for(var i=0; i < linkItems.length; i++) {
		if (linkItems[i].className == "active")
			linkItems[i].className = "";
	}
	
	document.getElementById(activeLinkId).className="active";
	var previews = document.getElementsByTagName("div");
	
	for(var i=0; i < previews.length; i++) {
		if (previews[i].className == "preview")
			previews[i].style.display = "";
	}
	
		
	document.getElementById(activePreviewId).style.display = "inline";
}