function sl_dropDown(params) {
	this.params = params;
	this.params.currentDiv = null;
	
	this.hideDropDown = function(level) {
		if (params.t) { clearTimeout(params.t); params.t = null; }

		if (level == 0) {
			params.buttonD.className = "nav";
		}
		for (var i = params.current_level; i >= level; i --) {	
			try {
				params.div_tree[i].parentNode.removeChild(params.div_tree[i]);
			} catch (e) {

			}
		}
		params.current_level = level - 1;
	};

	this.containerOver = function(overOrOut) {
		if (overOrOut) {
			if (params.t) { clearTimeout(params.t); params.t = null; }
		} else if (!params.t) {
			params.t = setTimeout("if (document.getElementById('"+params.currentDiv.id+"')) { document.getElementById('"+params.currentDiv.id+"').dd_ob.hideDropDown(0); }", 20);
		}
	};

	this.showDropDown = function(fromD,menu,level,overOrOut,index) {
		if (!overOrOut) {
			if (!params.t) {
				params.t = setTimeout("if (document.getElementById('"+params.currentDiv.id+"')) { document.getElementById('"+params.currentDiv.id+"').dd_ob.hideDropDown(0); }", 20);
			}
			return;
		}
		if (params.t) {
			clearTimeout(params.t); params.t = null; 
		}
		
		if (level == params.current_level) {
			if (index != params.level_tree[level]) {
				this.hideDropDown(level);
			} else {
				return;
			}
		}
		
		if (level == 0) { params.buttonD = fromD; }
		
		var parentD = level == 0 ? document.body : fromD;
		
		if (level < params.current_level) {
			this.hideDropDown(level);
		}
		
		if (!menu) return;
			
		//create container
		var d = document.createElement("div");
		d.id = "sl_dd_"+level+"_"+index;
		d.className = "dd_container";
		var pos = this.getDBox(fromD,level != 0);
		d.style.left = (level == 0 ? pos.x1 : pos.w + params.offW) + "px";
		d.style.top = (level == 0 ? pos.y2 : pos.y1 + params.offH) + "px";
		d.dd_ob = this;
		
		d.onmouseover = function(e) {
			this.dd_ob.containerOver(true);
			return this.dd_ob.stopEvent(e);
		};
		
		d.onmouseout = function(e) {
			this.dd_ob.containerOver(false);
			return this.dd_ob.stopEvent(e);		
		};
				
		//fill container
		for (var i = 0; i < menu.length; i ++) {
			var d2 = document.createElement("div");
			d2.className = "dd_item";
			d2.innerHTML = menu[i].title;
			d2.menu = menu[i];
			d2.num = i;
			d2.level = level;
			d2.dd_ob = this;
				
			d2.onmouseover = function(e) {
				this.dd_ob.showDropDown(this,this.menu.children,this.level+1,true,this.num);
				this.className = "dd_item dd_over";
				return this.dd_ob.stopEvent(e);
			};
			
			d2.onmouseout = function(e) {
				this.dd_ob.showDropDown(this,this.menu.children,this.level+1,false,this.num);
				this.className = "dd_item";
				return this.dd_ob.stopEvent(e);		
			};
			
			if (menu[i].url) {
				d2.onclick = function(e) {
					window.location.href = this.menu.url;
					return this.dd_ob.stopEvent(e);
				};
			}
			
			if (menu[i].children && navigator.userAgent.indexOf('MSIE') == -1) {
				d3 = document.createElement("div");
				d3.className = "dd_more";
				d2.appendChild(d3);
			}
				
			d.appendChild(d2);
		}
		//attach container
		
		params.div_tree[level] = d;
		params.level_tree[level] = index;
			
		parentD.appendChild(d);
		params.current_level = level;
		params.currentDiv = d;
	};

	this.navOver = function(d,over,n,currentPage) {
		params.currentPage = currentPage;
		if (!d.oldClassName) d.oldClassName = d.className;
		
		d.className = d.oldClassName+(over ? " navOver" : "");

		var n = n.split(/[^A-Za-z0-9]/).join("");
		if (params.dd[n]) {
			this.showDropDown(d,params.dd[n],0,over,n);
		}
	};

	this.stopEvent = function(e) {
		if (!e && window.event) e = window.event;
		if (e) {
			e.cancelBubble = true;
			if (e.preventDefault) {
				e.preventDefault();
			}
		}
		return false;
	};

	this.getDBox = function(d, onlyFirst) {
		if (!d) return false;

		var rv = Object();
		rv.y1 = rv.x1 = 0;
		rv.x2 = d.offsetWidth;
		rv.y2 = d.offsetHeight;
		if (d) {
			do {
				rv.x1 += d.offsetLeft - ((d.nodeName == "BODY") ? 0 : d.scrollLeft);
				rv.y1 += d.offsetTop - ((d.nodeName == "BODY") ? 0 : d.scrollTop);
				d = d.offsetParent;
			} while(d && !onlyFirst)
		}
		rv.x2 += rv.x1;
		rv.y2 += rv.y1;
		rv.w = rv.x2 - rv.x1;
		rv.h = rv.y2 - rv.y1;
		return rv;
	};
};