// JavaScript Document

function byId(id) {
return document.getElementById ? document.getElementById(id) : document.all[id];
}
var prevLink = "";
function changeActiveStates(ele) {
if (prevLink) byId(prevLink).className = "";
ele.className = 'activate';
prevLink = ele.id;
}

var browserType;

if (document.layers) {browserType = "nn4"}
if (document.all) {browserType = "ie"}
if (window.navigator.userAgent.toLowerCase().match("gecko")) {
 browserType= "gecko"
}

function hide2() {
  if (browserType == "gecko" )
     document.poppedLayer = 
         eval('document.getElementById("current")');
  else if (browserType == "ie")
     document.poppedLayer = 
        eval('document.getElementById("current")');
  else
     document.poppedLayer =   
        eval('document.layers["current"]');
  document.poppedLayer.style.display = "none";
}



function hide3() {
  if (browserType == "gecko" )
     document.poppedLayer = 
         eval('document.getElementById("port_upstate")');
  else if (browserType == "ie")
     document.poppedLayer = 
        eval('document.getElementById("port_upstate")');
  else
     document.poppedLayer =   
        eval('document.layers["port_upstate"]');
  document.poppedLayer.style.display = "none";
}

function show3() {
  if (browserType == "gecko" )
     document.poppedLayer = 
         eval('document.getElementById("port_upstate")');
  else if (browserType == "ie")
     document.poppedLayer = 
        eval('document.getElementById("port_upstate")');
  else
     document.poppedLayer =   
        eval('document.layers["port_upstate"]');
  document.poppedLayer.style.display = "block";
}





function showonlyone(thechosenone) {
      var newboxes = document.getElementsByTagName("div");
            for(var x=0; x<newboxes.length; x++) {
                  name = newboxes[x].getAttribute("name");
                  if (name == 'controls_numbers') {
                        if (newboxes[x].id == thechosenone) {
                        newboxes[x].style.display = 'block';
                  }
                  else {
                        newboxes[x].style.display = 'none';
                  }
            }
      }
}