function afficherDessous(idObj,idRef){var obj=document.getElementById(idObj);var ref=document.getElementById(idRef);if(obj==null||ref==null){return;}
obj.style.left=ref.offsetLeft+'px';obj.style.top=(ref.offsetTop+ref.offsetHeight)+'px';obj.style.width=ref.offsetWidth+'px';obj.style.display="block";}
function set_active(nom)
{element=document.getElementById(nom);if(element!=null){element.style.backgroundColor="#BBBBBB";}}