function writeCropsTree ()
{
	var crops_menu = getCurrentMenu("kulturen");
	if(crops_menu==null) return;
	var crops_items = crops_menu[0];
	var level=0;
	buildCropsTree(level,crops_items);
}
function addToString(txt,add,count,prepend)
{
	var res = txt;
	for(var i=0;i<count;i++)
		if(prepend)
			res = add + res;
		else
			res += add;
	return res;
	
}
var cropTreeNodesCounter=0;

var tree_img_plus = "/images/icon/plus.gif";
var tree_img_minus = "/images/icon/minus.gif";

var img_gewas_programma = "<td width=30 align=center><img src='/images/icon/gewas.gif' alt='Gewasprogramma' width='25' height='18' hspace='0' align='absmiddle'></td>";

var img_oplossingen = "<td width=30 align=center><img src='/images/icon/op.gif' align='absmiddle' alt='Oplossingen' width='19' height='17'></td>";

var img_links = "<td width=30 align=center><img src='/images/icon/link.gif' align='absmiddle' alt='Links' width='11' height='14'></td>";

function openCropTreeNode(img,node_id)
{
	var div = Obj("crop_tree_node_" +node_id);
	if(div==null) return;
	if(img.src.indexOf("minus.gif")>=0) //Open -> close
	{
		div.style.display= "none";
		img.src = tree_img_plus;
	}
	else
	{
		div.style.display= "";
		img.src = tree_img_minus;
	}
}
function buildCropsTree(level,items)
{
	cropTreeNodesCounter++;
	if(items==null)return;
	var actStyleClass = "bgtxt";
	if(level==0)
		actStyleClass = "titlesub";
	var img = "";
	var item_id=null;
	var item =null;
	var itemMenu, children;
	var item_link, item_name, item_title;
	var site_icon="";
	var prefix = addToString("","&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;",level,true);
	for(var i=0; i<items.length; i++)
	{
		item_id =items[i];
		item = _mi[item_id];
		if(item==null) continue;
		item_name = item[3];
		item_title = item[1];
		item_link = item[2];if(item_link!=null) item_link = item_link.toLowerCase();
		itemMenu = getCurrentMenu(item_name);
		if(itemMenu!=null)
		{	
			children = itemMenu[0];	
		}
		
		if(children!=null)
			img = "<td><img style='cursor:pointer;' height=9 onclick='openCropTreeNode(this, "+ cropTreeNodesCounter + ")' id='img_" + cropTreeNodesCounter + "' border=0 align=left src='" + tree_img_plus + "'></td>";
		else
			img = "";
		
		
			
		if(item_link!=null)
		{
			item_title = "<a href='" + item_link + "'>" + item_title + "</a>";	
			if(item_link.indexOf("oplossingen.shtm")>=0)
				site_icon = img_oplossingen;
			else if(item_link.indexOf("programma.shtm")>=0)
				site_icon = img_gewas_programma;
			else if(item_link.indexOf("links.shtm")>=0)
				site_icon = img_links;
			else
				site_icon = "";
			
		}
		if(document.location.href.toLowerCase().indexOf(item_link)==-1)
			echo("<table cellpadding=0 cellspacing=0><tr>" + 
					"<td>" + prefix + "</td>" + 
					img + 
					
					"<td style='padding-right:20px' >" + 
					"<span class=" + actStyleClass + ">" + item_title + "</span></td>"  + 							site_icon + 
					"</tr></table>"  + 
				"<br>");
		
		if(children!=null)
		{
			echo("<div id='crop_tree_node_" + cropTreeNodesCounter + "' style='display:none'>");
			buildCropsTree(level+1,children);
			echo("</div>");
		}
		
			
			
	}
}