//Variable definitions
var subcategories = new Array();
var req_processing = false;
//Adding in_array method to an Array object
Array.prototype.in_array = function ( obj ) {
	var len = this.length;
	for ( var x = 0 ; x <= len ; x++ ) {
		if ( this[x] == obj ) return true;
	}
	return false;
}

/*
 * Function to fetch submenu data and display it
 * Params: 
 * id - category id
 */
function get_subcategory(id)
{
	//Checking if script is interacting with server
	if(req_processing == false)
	{	
		var elem_id = id;
		
		//Checking if data has been fetched previously
		if(subcategories[id] == "" || typeof subcategories[id] == "undefined")
		{
			//Enabling processing mode
			req_processing = true;
				
			//Processing request
			new Ajax.Request("http://reklamawww.sstore.pl/menu_server.php", {
				method: "POST",
				parameters: {category_id: '"'+id+'"'},
				onSuccess: function(response)
				{
					
					response = eval(response.responseText);
					if(response != false)
					{
						var categories = response;
						var categories_html = new Array();
						if(typeof categories == "object" || typeof categories == "Array")
						{
							//Creating content objects
							subcategories[id] = new Array();
							for(i in categories)
							{
								add_elem(categories[i], elem_id);
							}
						}
					}
					//Disabling processing mode
					req_processing = false;
				},
				onError: function(){req_processing = false;}
			});
		}
	}
}

/*
 * Function to create elements to be appended to submenu
 * Params: 
 * data - Array[link, text]
 * id - element id
 */
function add_elem(data, id)
{
	var div_main = document.createElement("div");
	div_main.id = data['id'];
	div_main.className = "submenuKontener";
	/*if(div_main.addEventListener)
	{
		div_main.addEventListener("mouseover", function(){return get_subcategory(data['id']);}, false);
		div_main.addEventListener("mouseout", function(){return hide_submenu(data['id']);},false);
	}
	else if(div_main.attachEvent)
	{
		div_main.attachEvent("onmoseover", function(){return get_subcategory(data['id']);});
		div_main.attachEvent("onmouseout", function(){return hide_submenu(data['id']);});
	}
	else*/
	{
		div_main.onmouseover = (function(id){return function(){get_subcategory(id);}})(data['id']);
	}
	var content = document.createElement("p");
	content.innerHTML = "";
	var a = document.createElement("a");
	a.href =  data['link'];
	a.innerHTML = data['text'];
	var div = document.createElement("div");
	div.id = "category_"+data['id']+"_submenu";
	content.appendChild(a);
	div_main.appendChild(content);
	div_main.appendChild(div);
	//Sending prepared content array to global subcategories array
	if(subcategories[id].indexOf(div_main) == -1)
	{
		subcategories[id].push(div_main);	
		//Appending objects to div and array
		$("category_"+id+"_submenu").appendChild(div_main);
		$("category_"+id+"_submenu").className = "submenu";
	} 
	else
		div_main = null;
	var parent_zindex = $("category_"+id+"_submenu").parentNode.style.zIndex;
	$("category_"+id+"_submenu").style.zIndex = (parent_zindex+1);
	return;
}

/*
 * Function to hide submenu
 * Params: 
 * id - element id
 */
function hide_submenu(id)
{
	$("category_"+id+"_submenu").style.display = "none";
}

function hide_tree(tree)
{
	tree = tree.split("_");
	for(i=tree.length-1; i>=0; i--)
	{
		var output = "";
		for(j=0; j<=i; j++)
		{
			var separator = (output == "" ? "" : "_");
			output = output+separator+tree[j];
		}
		hide_submenu(output);
	}
}