/*************************************************************************
  dw_tooltip.js   requires: dw_event.js and dw_viewport.js
  version date: May 21, 2005 moved init call to body onload
  (March 14, 2005: minor changes in position algorithm and timer mechanism)
  
  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,
    offX: 8,
    offY: 12,
    tipID: "tipDiv",
    showDelay: 100,
    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;
}
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);
}
};