/*************************************************************************
  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 dw_event = {
  
  add: function(obj, etype, fp, cap) {
    cap = cap || false;
    if (obj.addEventListener) obj.addEventListener(etype, fp, cap);
    else if (obj.attachEvent) obj.attachEvent("on" + etype, fp);
  }, 

  remove: function(obj, etype, fp, cap) {
    cap = cap || false;
    if (obj.removeEventListener) obj.removeEventListener(etype, fp, cap);
    else if (obj.detachEvent) obj.detachEvent("on" + etype, fp);
  }, 

  DOMit: function(e) { 
    e = e? e: window.event;
    e.tgt = e.srcElement? e.srcElement: e.target;
    
    if (!e.preventDefault) e.preventDefault = function () { return false; }
    if (!e.stopPropagation) e.stopPropagation = function () { if (window.event) window.event.cancelBubble = true; }
        
    return e;
  }
  
}

var viewport = {
  getWinWidth: function () {
    this.width = 0;
    if (window.innerWidth) this.width = window.innerWidth - 18;
    else if (document.documentElement && document.documentElement.clientWidth) 
  		this.width = document.documentElement.clientWidth;
    else if (document.body && document.body.clientWidth) 
  		this.width = document.body.clientWidth;
  },
  
  getWinHeight: function () {
    this.height = 0;
    if (window.innerHeight) this.height = window.innerHeight - 18;
  	else if (document.documentElement && document.documentElement.clientHeight) 
  		this.height = document.documentElement.clientHeight;
  	else if (document.body && document.body.clientHeight) 
  		this.height = document.body.clientHeight;
  },
  
  getScrollX: function () {
    this.scrollX = 0;
  	if (typeof window.pageXOffset == "number") this.scrollX = window.pageXOffset;
  	else if (document.documentElement && document.documentElement.scrollLeft)
  		this.scrollX = document.documentElement.scrollLeft;
  	else if (document.body && document.body.scrollLeft) 
  		this.scrollX = document.body.scrollLeft; 
  	else if (window.scrollX) this.scrollX = window.scrollX;
  },
  
  getScrollY: function () {
    this.scrollY = 0;    
    if (typeof window.pageYOffset == "number") this.scrollY = window.pageYOffset;
    else if (document.documentElement && document.documentElement.scrollTop)
  		this.scrollY = document.documentElement.scrollTop;
  	else if (document.body && document.body.scrollTop) 
  		this.scrollY = document.body.scrollTop; 
  	else if (window.scrollY) this.scrollY = window.scrollY;
  },
  
  getAll: function () {
    this.getWinWidth(); this.getWinHeight();
    this.getScrollX();  this.getScrollY();
  }
  
}

var Tooltip =  {
    followMouse : true, offX : 8, offY : 12, tipID : "tipDiv", showDelay : 100, hideDelay : 000, 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);
    }
}
;