function hideall()
{
 document.all["menu"].style.visibility="hidden";
 document.all["wine"].style.visibility="hidden";
 document.all["chefs"].style.visibility="hidden";
 document.all["special"].style.visibility="hidden";
 document.all["about"].style.visibility="hidden";
 document.all["discounts"].style.visibility="hidden";
}

function imshow(imgName)
{
 hideall();
 document.all[imgName].style.visibility="visible";
}

function imhide(imgName)
{
 document.all[imgName].style.visibility="hidden";
}