// JavaScript Document

		function findimg()
		{
			var i,imgs;
		// loop through all images of the document
			imgs=document.getElementsByTagName('img');
			for(i=0;i<imgs.length;i++)
			{
		// test if the class 'roll' exists
				if(/roll/.test(imgs[i].className))
				{
		// add the function roll to the image onmouseover and onmouseout and send
		// the image itself as an object
					imgs[i].onmouseover=function(){roll(this);};
					imgs[i].onmouseout=function(){roll(this);};
				}
			}
		}
		function roll(o)
		{
		// get the src of the image, and find out the file extension
			var src = o.src;
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
		// check if the src already has an _on and delete it, if that is the case 
			if(/_on/.test(src))
			{
				var newsrc = src.replace('_on','');
			}else{
		// else, add the _on to the src 
				var newsrc = src.replace(ftype, '_on'+ftype);
			}
			o.src=newsrc;
		}

function addLoadListener(func) {
   if (window.addEventListener) {
      window.addEventListener("load", func, false);
   } else if (document.addEventListener) {
      document.addEventListener("load", func, false);
   } else if (window.attachEvent) {
      window.attachEvent("onload", func);
   } else if (typeof window.onload != "function") {
      window.onload = func;
   } else {
      var oldonload = window.onload;
      window.onload = function() {
         oldonload();
         func();
      };
   }
}


addLoadListener(findimg);


function visibilite(thingId)
	{
		targetElement = document.getElementById(thingId) ;
		targetElement.style.display = "" ;
	}
function unvisibilite(thingId)
	{
		targetElement = document.getElementById(thingId) ;
		targetElement.style.display = "none" ;
	}