function HideContent(d) {
if(d.length < 1) { return; }
document.getElementById(d).style.display = "none";
}
function ShowContent(d) {
if(d.length < 1) { return; }
document.getElementById(d).style.display = "block";
}
function ReverseContentDisplay(d) {
document.getElementById('1').style.display = "none";
document.getElementById('2').style.display = "none";
document.getElementById('3').style.display = "none";
document.getElementById(d).style.display = "block"; 
}
function HigliteDisNav(d) {
document.getElementById('tab1').className = "";
document.getElementById('tab2').className = "";
document.getElementById('tab3').className = "";
document.getElementById(d).className = "selected";
}