function mostrar(div1)
{
      document.all[div1].style.visibility='visible'; 
}
function ocultar(div1)
{
      document.all[div1].style.visibility='hidden'; 
}
function mostrar2(div2)
{
      document.all[div2].style.visibility='visible'; 
}
function ocultar2(div2)
{
      document.all[div2].style.visibility='hidden'; 
}
function mostrar3(div3)
{
      document.all[div3].style.visibility='visible'; 
}
function ocultar3(div3)
{
      document.all[div3].style.visibility='hidden'; 
}
function mostrar4(div4)
{
      document.all[div4].style.visibility='visible'; 
}
function ocultar4(div4)
{
      document.all[div4].style.visibility='hidden'; 
}
function mostrar5(div5)
{
      document.all[div5].style.visibility='visible'; 
}
function ocultar5(div5)
{
      document.all[div5].style.visibility='hidden'; 
}