function visit(newURL) {
      if (newURL != "") {
       document.location=newURL
      }
    }


var layer_cour = null; 

function show(object) { 
   if (document.getElementById) 
      document.getElementById(object).style.visibility = 'visible';
   
   else if (document.layers) { 
      if (document.layers[object] != null)
         document.layers[object].visibility = 'visible'; 

   } 
   else if (document.all) // instructions pour IE 4, 5 & 6 
      document.all[object].style.visibility = 'visible'; 
} 

function hide(object) { 
   if (document.getElementById) 
      document.getElementById(object).style.visibility = 'hidden';   
   
   else if (document.layers) { 
      if (document.layers[object] != null) 
         document.layers[object].visibility = 'hidden'; 
  
   } 
   else if (document.all) 
      document.all[object].style.visibility = 'hidden'; 
  
} 

function mouseOver(object) { 
   if (layer_cour != null) 
      hide (layer_cour); 
   if (object != null) { 
      show(object); 
      layer_cour = object; 
   } 
   else layer_cour = null; 
} 


function mouseClose() { 
   if (layer_cour != null) 
      hide (layer_cour); 
  
}