function hideshow(which)
{
if (!document.getElementById|document.all)
        return
else{
        if (document.getElementById)
                oWhich = eval ("document.getElementById('" + which + "')");
        else
                oWhich = eval ("document.all." + which);
        }

        window.focus();

        if (oWhich.style.display=="none")
                oWhich.style.display="";
        else
                oWhich.style.display="none";
}