function showNavFix(){document.getElementById('nav').style.display='block';}
function showNav2Fix(){document.getElementById('nav2').style.display='block';}
function showNav3Fix(){document.getElementById('nav3').style.display='block';}

function showNav(){$("#nav").slideToggle("fast");}
function showNav2(){$("#nav2").slideToggle("normal");}
function showNav3(){$("#nav3").slideToggle("slow");}