var
  selTab;


function initDisplay() {
  selTab = (document.getElementById) ? document.getElementById("tab1") : document.all["tab1"]; 
  if (selTab) {
    selTab.style.backgroundColor = "#EA0000";
    selTab.style.color = "white";
  }
}

function toggleDisplay(id) {
  for(i=1; i<=5; i++) {
    if (i == id) {
      var tbl = ( document.getElementById ) ? document.getElementById("table" + i) : eval('document.all["table" + i]');
      tbl.style.zIndex = 2;
      tbl.style.visibility = "visible";
      tbl.style.display = "block";
    } else {
      var tbl = ( document.getElementById ) ? document.getElementById("table" + i) : eval('document.all["table" + i]');
      tbl.style.zIndex = 1;
      tbl.style.visibility = "hidden";
      tbl.style.display = "none";
    }
  }
  if (selTab) {
    selTab.style.backgroundColor = "#B2B2B2";
    selTab.style.color = "black";
  }
  selTab = ( document.getElementById ) ? document.getElementById("tab" + id) : eval('document.all["tab" + id]');
  selTab.style.backgroundColor = "#EA0000";
  selTab.style.color = "white";
}