window.onload = function(){
      BubbleTips.activateTipOn("abbr");
      BubbleTips.activateTipOn("acronym");
      BubbleTips.activateTipOn("img");
      //BubbleTips.activateTipOn("input");
      BubbleTips.activateTipOn("a");
      BubbleTips.activateTipOn("label");
    };
    
    var BubbleTips = {
    opacity : "0.9",
    bubbleNode : null,
    activateTipOn : function(type){
      var bubble = document.createElement("span");
      bubble.style.position = "absolute";
      bubble.style.zIndex = "99";
      this.bubbleNode = bubble;
      document.getElementsByTagName("body")[0].appendChild(bubble);
      var tipTags = document.getElementsByTagName(type);
      for(var i=0;i<tipTags.length;i++){
        this.bindBubbleTip(tipTags[i]);
      }
    },
    bindBubbleTip : function(elem) {
      var tipText=elem.getAttribute("title");
      if(tipText!=null && tipText.length!=0 && tipText!='null' && tipText!='') {
        elem.removeAttribute("title");
        if (isIE) elem.alt=''; //ie7 rado zobrazuje alt, ak neexistuje title
        var bubble = this.createElem("span","bubbleTooltip");
        var tipTop = this.createElem("span","top");
        tipTop.appendChild(document.createTextNode(tipText));
        bubble.appendChild(tipTop);
        bubble.appendChild(this.createElem("span","bottom"));
        Effects.setOpacity(bubble,this.opacity);
        elem.tooltip = bubble;
        elem.onmouseover = ToolTipEvents.showTooltip;
        elem.onmouseout = ToolTipEvents.hideTooltip;
        elem.onmousemove = ToolTipEvents.followMouse;
      }
    },
    createElem : function(tag,className){
      var elem = document.createElement(tag);
      elem.className = className;
      elem.style.display = "block";
      return elem;
    }
  };
  
  var ToolTipEvents = {
    offsetLeft : (-25),
    offsetTop : (10),
    posRef : function(){
      return ((document.documentElement.scrollTop)?
      document.documentElement : document.body)
      },
    showTooltip : function(e){
      ToolTipEvents._cleanup();
      BubbleTips.bubbleNode.appendChild(this.tooltip);
      Effects.fadeIn(this.tooltip,BubbleTips.opacity);
      ToolTipEvents.followMouse(e);
    },
    hideTooltip : function(e){
      Effects.fadeOut(this.tooltip, ToolTipEvents._cleanup);
    },
    followMouse : function(e){
      if(e == null){ e = window.event };
      var posx = ToolTipEvents.offsetLeft;
      var posy = ToolTipEvents.offsetTop;
      if(e.pageX || e.pageY){
        posx += e.pageX;
        posy += e.pageY;
      }
          else if(e.clientX || e.clientY) {
            posx += e.clientX;
            posy += e.clientY;
          }
      if (isIE){
        var ieBody=(document.compatMode && document.compatMode != "BackCompat")? document.documentElement : document.body; //strict vs. quirk
        posx += ieBody.scrollLeft;
        posy += ieBody.scrollTop;
      }
      BubbleTips.bubbleNode.style.top = (posy) + "px";
      BubbleTips.bubbleNode.style.left = (posx) + "px";
    },
    _cleanup : function(){
      var bubble = BubbleTips.bubbleNode;
      if( bubble.childNodes.length > 0 ){
        bubble.removeChild(bubble.firstChild);
      }
    }
  };
  
  var Effects = {
    fadeIn : function (elem,maxOpac){
      elem.fadeIn = Effects._fadeIn;
      elem.maxOpac = maxOpac;
      elem.curOpac = 0;
      this.cancelCurrent();
      elem.fadeIn();
    },
    fadeOut : function (elem,fadeDoneF){
      elem.fadeOut = Effects._fadeOut;
      elem.fadeOutDone = fadeDoneF;
      this.cancelCurrent();
      elem.fadeOut();
    },
    cancelCurrent : function() {
      clearTimeout(window.evtId);
    },
    _fadeIn : function() {
      if( (+this.curOpac) < (+this.maxOpac) ){
        this.curOpac = Math.round(((+this.curOpac)+(0.05))*100)/100; //zaokruhlenie kvoli chybovym hlaskam FF a Op
        Effects.setOpacity(this,this.curOpac);
        window.fadeInElem = this;
        window.evtId = setTimeout(function(){
          this.fadeInElem.fadeIn()
          },30);
        
      } else {
        Effects.setOpacity(this,this.maxOpac);
        window.fadeInElem = null;
      }
    },
    _fadeOut : function() {
      if( (+this.curOpac) > 0 ){
        this.curOpac = Math.round((Math.max(0,(+this.curOpac)-(0.05)))*100)/100; //zaokruhlenie kvoli chybovym hlaskam FF a Op        Effects.setOpacity(this,this.curOpac);
        window.fadeOutElem = this;
        window.evtId = setTimeout(function(){
          this.fadeOutElem.fadeOut()
          },30);
      } else if(this.fadeOutDone) {
        this.fadeOutDone();
        window.fadeOutElem = null;
      }
    },
    setOpacity : function (elem,opac){
      elem.style.filter="alpha(opacity:"+((+opac)*100)+")";
      elem.style.KHTMLOpacity=opac;
      elem.style.MozOpacity=opac;
      elem.style.opacity=opac;
    }
  };

var isOpera = (navigator.userAgent.indexOf('Opera') != -1);
var isIE = (!isOpera && navigator.userAgent.indexOf('MSIE') != -1);