function showCours(str)
{ 
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null)
	 {
	 alert ("Browser does not support HTTP Request")
	 return
	 } 
	var url="getcours.php"
	url=url+"?q="+str
	xmlHttp.onreadystatechange=stateChanged 
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
}

function stateChanged() 
{ 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
	 { 
	 document.getElementById("txtHint").innerHTML=xmlHttp.responseText
     document.getElementById("txtHint").style.visibility = "visible";
	 document.getElementById("txtHint").style.top = y+10;
     document.getElementById("txtHint").style.left = x+10;

	 } 
}
	
function GetXmlHttpObject()
{
	var xmlHttp=null;
	try
	 {
	 // Firefox, Opera 8.0+, Safari
	 xmlHttp=new XMLHttpRequest();
	 }
	catch (e)
	 {
	 //Internet Explorer
	 try
	  {
	  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
	  }
	 catch (e)
	  {
	  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
	  }
	 }
	return xmlHttp;
}

function HideCours()
{
    document.getElementById("txtHint").style.visibility = "hidden";
}

function Pos_Souris(e)
   {
   x = (navigator.appName.substring(0,3) == "Net") ? e.pageX : event.x+document.body.scrollLeft;
   y = (navigator.appName.substring(0,3) == "Net") ? e.pageY : event.y+document.body.scrollTop;
   }

function Pos_Souris(e)
{
   x = (navigator.appName.substring(0,3) == "Net") ? e.pageX : event.x+document.body.scrollLeft;
   y = (navigator.appName.substring(0,3) == "Net") ? e.pageY : event.y+document.body.scrollTop;

}

var x = 0;
var y = 0;

if (document.getElementById)
   {
   if(navigator.appName.substring(0,3) == "Net")
      document.captureEvents(Event.MOUSEMOVE);
   document.onmousemove = Pos_Souris;
   }