// switch en utilisant display:block/table-row/none
function switch_module (idname1,idname2)
{
var ca = document.getElementById(idname1);
var cb = document.getElementById(idname2);
try
  {
  if (cb.style.visibility != "hidden"){ca.style.visibility = "";cb.style.visibility = "hidden";}
  else {ca.style.visibility = "hidden";cb.style.visibility = "visible";cb.style.margin = "2px auto";}
  }
catch (e)
  {
  ca.style.visibility = "visible";
  cd.style.visibility = "visible";
  }
}

// switch en utilisant display:block/table-row/none
function zoom (idname1,idname2)
{
var ca = document.getElementById(idname1);
var cb = document.getElementById(idname2);
try
  {
  if (cb.style.display != "none"){ca.style.display = "table-row";cb.style.display = "none";}
  else {ca.style.display = "none";cb.style.display = "table-row";}
  }
catch (e)
  {
  if (cb.style.display != "none"){ca.style.display = "block";cb.style.display = "none";}
  else {ca.style.display = "none";cb.style.display = "block";}
  }
}

// vide le champs si string initial
function empty(elt,str)
{
if (elt.value==str)
   {elt.value="";}
}