function ventanaPopupImagen(URL)
{
   window.open(URL,"imagen","width=640, height=480, scrollbars=no, menubar=no, location=no, resizable=no, fullscreen=no")
}

function ventanaPopupCompleta(URL)
{
   window.open(URL,"direccion","scrollbars=yes, directories=yes, menubar=yes, location=yes, resizable=yes, status=yes, titlebar=yes, toolbar=yes, fullscreen=yes")
}

function submitenter(e)
{
var keycode;
if (window.event) keycode = window.event.keyCode;
else if (e) keycode = e.which;
else return true;

if (keycode == 13)
   {
   document.busqueda_form.isSearch.value=true;
   document.busqueda_form.all.value=false;
   document.busqueda_form.submit();
   return false;

   }
else
   return true;
}