corrigerLi = function()
{
  if(document.all&&document.getElementById)
     {
          li = document.getElementById('menu').getElementsByTagName('li');

          for(var i=0; i < li.length; i++)
          {
		    
                 li[i].onmouseover = function(){ this.className+=" over"; };
                 li[i].onmouseout = function(){ this.className=this.className.replace(" over", "");};
			   		 
          }
     } 
}