function OpenCenterPopUp(id){    
    var Left=(window.screen.width/2)-260;
    var Top=(window.screen.height/2)-350;
  //Videment faut modifier la config!!
   // var Configuration="'scrollbars=yes, resizeable, width=480, height=600, left=" + Left + ", top=" + Top + "'";
    window.open('pop_up.asp?id='+id,'description','scrollbars=1,resizable=1, width=520, height=700, left=' + Left + ', top=' + Top + '');
}
function afficher(id)
  {
    if (document.getElementById(id).style.display == 'none') 
    	current = 'block' 
    else 
    	current = 'none';
    document.getElementById(id).style.display = current;
  }