function toggle_folder (id) { 

	var folder = document.getElementById('folder_'+id);
	var folderimg = document.getElementById('folderimg_'+id);
	var treeimg = document.getElementById('tree_'+id);
	
	if(folder.style.display == "block") { 
	
		folder.style.display = "none";
		folderimg.src = "images/folder.gif";
		treeimg.src = "images/tree_expand.gif";
	
	} else { 
	
		folder.style.display = "block";
		folderimg.src = "images/folder_go.gif";
		treeimg.src = "images/tree_collapse.gif";
	
	}

}

function show_desc(id) { 

	var desc = document.getElementById('desc_'+id);
	
	if(desc.style.display == "block") { 
	
		desc.style.display = "none";
	
	} else { 
	
		desc.style.display = "block";
	
	}

}