/*************************************************************************
  dw_tooltip_sel.js, dw_tooltip.js with integrated select list overlay 
  requires: dw_event.js and dw_viewport.js
  version date: May 21, 2005 moved init call to body onload
  
  This code is from Dynamic Web Coding at dyn-web.com
  Copyright 2003-5 by Sharon Paine 
  See Terms of Use at www.dyn-web.com/bus/terms.html
  regarding conditions under which you may use this code.
  This notice must be retained in the code as is!
*************************************************************************/

var Tooltip = {
    followMouse: true,
    overlaySelects: true,  // iframe shim for select lists (ie win)
    offX: 8,
    offY: 12,
    tipID: "tipDiv",
    showDelay: 100,
    hideDelay: 200,
	ovTimer:0,
	ready:false,
	timer:null,
	tip:null,
	shim:null,
	supportsOverlay:false,
	init:function(){  
		if(document.createElement&&document.body&&typeof document.body.appendChild!="undefined"){
			var el=document.createElement("DIV"); 
			el.id=this.tipID;
			document.body.appendChild(el);
			this.supportsOverlay=this.checkOverlaySupport();
			this.ready=true;
		}
	},
	show:function(e,msg){
			if(this.timer){
				clearTimeout(this.timer);
				this.timer=0;
			}
			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.handleOverlay(1,this.showDelay);
			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";
			}this.positionOverlay();
		},
		hide:function(){
			if(this.timer){
				clearTimeout(this.timer);
				this.timer=0;
			}
			this.handleOverlay(0,this.hideDelay);
			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);
		},
		checkOverlaySupport:function(){
			if(navigator.userAgent.indexOf("Windows")!=-1&&typeof document.body!="undefined"&&typeof document.body.insertAdjacentHTML!="undefined"&&!window.opera&&navigator.appVersion.indexOf("MSIE 5.0")==-1)
			return true;
			else return false;
		},
		handleOverlay:function(bVis,d){
			if(this.overlaySelects&&this.supportsOverlay){
				if(this.ovTimer){
					clearTimeout(this.ovTimer);
					this.ovTimer=0;
				}switch(bVis){
					case 1: if(!document.getElementById('tipShim'))document.body.insertAdjacentHTML("beforeEnd",'<iframe id="tipShim" src="about:blank" style="position:absolute; left:0; top:0; z-index:500; visibility:hidden" scrolling="no" frameborder="0"></iframe>');
							this.shim=document.getElementById('tipShim');
							if(this.shim&&this.tip){
								this.shim.style.width=this.tip.offsetWidth+"px";
								this.shim.style.height=this.tip.offsetHeight+"px";
							}
							this.ovTimer=setTimeout("Tooltip.toggleVis('tipShim', 'visible')",d);
							break;
					case 0: this.ovTimer=setTimeout("Tooltip.toggleVis('tipShim', 'hidden')",d);
							if(this.shim)this.shim=null;break;
				}
			}
		},
		positionOverlay:function(){
			if(this.overlaySelects&&this.supportsOverlay&&this.shim){
				this.shim.style.left=this.tip.style.left;
				this.shim.style.top=this.tip.style.top;
			}
		}
	};