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: 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.ready)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);
  }
};

function doTooltip(e, ar) {
  var cntnt = wrapTipContent(ar);
  var tip = document.getElementById( Tooltip.tipID );
  Tooltip.show(e, cntnt);
};

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

function wrapTipContent(ar) {
  if ( typeof Tooltip == "undefined" || !Tooltip.ready ) return;
  var cntnt = "";
  if ( ar ) cntnt += '<div class="img"><img src="' + ar + '"></div>';
  return cntnt;
};

function preload(pic) {
  picl = new Image(320,240);
  picl.src = "pictures/" + pic + "M.jpg"
  return picl;
};

var pics = new Array();