var Tooltip = {
	followMouse: true,
	offX: 8,
	offY: 12,
	tipID: "tipDiv",
	showDelay: 200,
	hideDelay: 200,
	ready:false,
	timer:null,
	tip:null,
	init:function(){
		if(document.createElement&&document.body&&typeof document.body.appendChild!="undefined"){
			if(!document.getElementById(this.tipID)){
				var el=document.createElement("DIV");
				el.id=this.tipID;
				document.body.appendChild(el);
			}

			this.ready=true;
		}
	},

	show:function(e,msg){
		if(this.timer){
			clearTimeout(this.timer);
			this.timer=0;
		}
	
		//if(!this.ttready)
		//	return;
	
		this.tip=document.getElementById(this.tipID);
	
		if(this.followMouse)
			dw_event.add(document,"mousemove",this.trackMouse,true);
	
		this.writeTip("");
		this.writeTip(msg);
		viewport.getAll();
		this.positionTip(e);
		this.timer=setTimeout("Tooltip.toggleVis('"+this.tipID+"', 'visible')",this.showDelay);
	},
	
	writeTip:function(msg){
		if(this.tip&&typeof this.tip.innerHTML!="undefined")
			this.tip.innerHTML=msg;
	},
	
	positionTip:function(e){
		if(this.tip&&this.tip.style){
			var x=e.pageX?e.pageX:e.clientX+viewport.scrollX;
			var y=e.pageY?e.pageY:e.clientY+viewport.scrollY;
		
			if(x+this.tip.offsetWidth+this.offX>viewport.width+viewport.scrollX){
				x=x-this.tip.offsetWidth-this.offX;
				if(x<0)
					x=0;
			}
			else 
				x=x+this.offX;
		
			if(y+this.tip.offsetHeight+this.offY>viewport.height+viewport.scrollY){
				y=y-this.tip.offsetHeight-this.offY;
				if(y<viewport.scrollY)
					y=viewport.height+viewport.scrollY-this.tip.offsetHeight;
			}
			else 
				y=y+this.offY;
		
			this.tip.style.left=x+"px";
			this.tip.style.top=y+"px";
		}
	},
	
	hide:function(){
		if(this.timer){
			clearTimeout(this.timer);this.timer=0;
		}
	
		this.timer=setTimeout("Tooltip.toggleVis('"+this.tipID+"', 'hidden')",this.hideDelay);
	
		if(this.followMouse)
			dw_event.remove(document,"mousemove",this.trackMouse,true);
	
		this.tip=null;
	},
	
	toggleVis:function(id,vis){
		var el=document.getElementById(id);
		if(el)el.style.visibility=vis;
	},
	
	trackMouse:function(e){
		e=dw_event.DOMit(e);
		Tooltip.positionTip(e);
	}
	
	
};

//Tooltip.ttready=true;

function mf(x,y) {
	self.scrollTo(x,y);
}

function mfp(p) {
	self.scrollTo(mB[p][0]-50,mB[p][1]-50);
}

Tooltip.offX = 0;  
Tooltip.offY = 0;
Tooltip.followMouse = false;  // must be turned off for hover-tip

function doTooltip(e, msg) {
  msg = unescape(msg);
  if ( typeof Tooltip == "undefined" || !Tooltip.ready || msg == '0' ) return;
  msg = '<br>'+msg;
  Tooltip.clearTimer();
  var tip = document.getElementById? document.getElementById(Tooltip.tipID): null;
  if ( tip && tip.onmouseout == null ) {
      tip.onmouseout = Tooltip.tipOutCheck;
      tip.onmouseover = Tooltip.clearTimer;
  }
  Tooltip.show(e, msg);
}

function hideTip() {
  if ( typeof Tooltip == "undefined" || !Tooltip.ready ) return;
  Tooltip.timerId = setTimeout("Tooltip.hide()", 3000);
}

Tooltip.tipOutCheck = function(e) {
  e = dw_event.DOMit(e);
  // is element moused into contained by tooltip?
  var toEl = e.relatedTarget? e.relatedTarget: e.toElement;
  if ( this != toEl && !contained(toEl, this) ) Tooltip.hide();
}

// returns true of oNode is contained by oCont (container)
function contained(oNode, oCont) {
  if (!oNode) return; // in case alt-tab away while hovering (prevent error)
  while ( oNode = oNode.parentNode ) if ( oNode == oCont ) return true;
  return false;
}

Tooltip.timerId = 0;
Tooltip.clearTimer = function() {
  if (Tooltip.timerId) { clearTimeout(Tooltip.timerId); Tooltip.timerId = 0; }
}

Tooltip.unHookHover = function () {
    var tip = document.getElementById? document.getElementById(Tooltip.tipID): null;
    if (tip) {
        tip.onmouseover = null; 
        tip.onmouseout = null;
        tip = null;
    }
}

dw_event.add(window, "unload", Tooltip.unHookHover, true);