function hide(d) {
if(d.length < 1) { return; }
document.getElementById(d).style.display = "none";
document.getElementById(d + "tab").className = "guidetab";
}
function show(d) {
if(d.length < 1) { return; }
document.getElementById(d).style.display = "block";
document.getElementById(d + "tab").className = "guidetabselected";
}