function enableTooltips(id){   
  var links,i,h;   
  if(!document.getElementById || !document.getElementsByTagName) return;   
  /*AddCss(); */
  h=document.createElement("span");   
  h.id="btc";   
  h.setAttribute("id","btc");   
  h.style.position="absolute";   
  document.getElementsByTagName("body")[0].appendChild(h);   
  if(id==null) links=document.getElementsByTagName("a");   
  else links=document.getElementById(id).getElementsByTagName("a");   
  for(i=0;i<links.length;i++){   
  Prepare(links[i]);   
  }   
  }   
function Prepare(el){   
  var tooltip,t,b,s,l;   
  t=el.getAttribute("title");   
  if(t==null || t.length==0) t="link:";     
  if (t!="link:") {  
	el.removeAttribute("title"); 
  	tooltip=CreateEl("span","tooltip");  	
	s=CreateEl("span","top");   
	s.innerHTML = t;
  	//s.appendChild(document.createTextNode(t));   
  	tooltip.appendChild(s);   
  	b=CreateEl("span","bottombottom");   
  	//l=el.getAttribute("href");   
  	//if(l.length>30) l=l.substr(0,27)+"...";   
  	b.appendChild(document.createTextNode(""));   
  	tooltip.appendChild(b);   
  	setOpacity(tooltip);   
  	el.tooltip=tooltip;   
  	el.onmouseover=showTooltip;   
  	el.onmouseout=hideTooltip;   
  	el.onmousemove=Locate; 
  }  
  }   
function showTooltip(e){   
  document.getElementById("btc").appendChild(this.tooltip);   
  Locate(e);   
  }   
function hideTooltip(e){   
  var d=document.getElementById("btc");   
  if(d.childNodes.length>0) d.removeChild(d.firstChild);
  }   
function setOpacity(el){   
  el.style.filter="alpha(opacity:95)";   
  el.style.KHTMLOpacity="0.95";   
  el.style.MozOpacity="0.95";   
  el.style.opacity="0.95";   
  }   
function CreateEl(t,c){   
  var x=document.createElement(t);   
  x.className=c;   
  x.style.display="block";   
  return(x);   
  }   
function AddCss(){   
  var l=CreateEl("link");   
  l.setAttribute("type","text/css");   
  l.setAttribute("rel","stylesheet");   
  l.setAttribute("href","/css/infobulle.css");   
  l.setAttribute("media","screen");   
  document.getElementsByTagName("head")[0].appendChild(l);   
  }   
function Locate(e){   
  var posx=0,posy=0;   
  if(e==null) e=window.event;   
  if(e.pageX || e.pageY){   
  posx=e.pageX; posy=e.pageY;   
  }   
  else if(e.clientX || e.clientY){   
  if(document.documentElement.scrollTop){   
  posx=e.clientX+document.documentElement.scrollLeft;   
  posy=e.clientY+document.documentElement.scrollTop;   
  }   
  else{   
  posx=e.clientX+document.body.scrollLeft;   
  posy=e.clientY+document.body.scrollTop;   
  }   
  }   
  document.getElementById("btc").style.top=(posy+20)+"px";   
  document.getElementById("btc").style.left=(posx-20)+"px";   
  }

window.onload=function(){enableTooltips("bloc_centre")};