if (document.images) {
about_on = new Image(); // Active images
about_on.src = "images/about_1.gif";

about_off = new Image(); // Active images
about_off.src = "images/about_0.gif";

ameneties_on = new Image(); // Active images
ameneties_on.src = "images/ameneties_1.gif";

ameneties_off = new Image(); // Active images
ameneties_off.src = "images/ameneties_0.gif";

features_on = new Image(); // Active images
features_on.src = "images/features_1.gif";

features_off = new Image(); // Active images
features_off.src = "images/features_0.gif";

services_on = new Image(); // Active images
services_on.src = "images/services_1.gif";

services_off = new Image(); // Active images
services_off.src = "images/services_0.gif";

contact_on = new Image(); // Active images
contact_on.src = "images/contact_1.gif";

contact_off = new Image(); // Active images
contact_off.src = "images/contact_0.gif";

}

var isNN = (navigator.appName.indexOf("Netscape")!=-1);
  function autoTab(input,len, e) {
  var keyCode = (isNN) ? e.which : e.keyCode;
  var filter = (isNN) ? [0,8,9] : [0,8,9,16,17,18,37,38,39,40,46];
  if(input.value.length >= len && !containsElement(filter,keyCode)) {
  input.value = input.value.slice(0, len);
  input.form[(getIndex(input)+1) % input.form.length].focus();
}
function containsElement(arr, ele) {
  var found = false, index = 0;
  while(!found && index < arr.length)
  if(arr[index] == ele)
  found = true;
  else
  index++;
  return found;
}
function getIndex(input) {
  var index = -1, i = 0, found = false;
  while (i < input.form.length && index == -1)
  if (input.form[i] == input)index = i;
  else i++;
  return index;
  }
  return true;
}


function imageOn(imgName) {
if (document.images) {
document.getElementById(imgName).src = eval(imgName + "_on.src");
}
}

function imageOff(imgName) {
if (document.images) {
document.getElementById(imgName).src = eval(imgName + "_off.src");
}
}