var vPage = 'pg1';
var vTab = 'tab1';
function setPage(pgNum, tabNum) {
  if (pgNum != vPage) {
    document.getElementById(pgNum).style.display = "block";
    document.getElementById(vPage).style.display = "none";
    vPage = pgNum; }
  if (tabNum != vTab) {
    document.getElementById(tabNum).style.backgroundColor = "#FFFFFF";
    document.getElementById(vTab).style.backgroundColor = "#B8B8B8";
    vTab = tabNum; }
}