function MM_swapImgRestore() { //v1.0
 if (validBrowser()) {
  if (document.MM_swapImgData != null)
    for (var i=0; i<(document.MM_swapImgData.length-1); i+=2)
      document.MM_swapImgData[i].src = document.MM_swapImgData[i+1];
 }
}

function MM_preloadImages() { //v1.0
 if (validBrowser()) {
  if (document.images) {
    var imgFiles = MM_preloadImages.arguments;
    var preloadArray = new Array();
    for (var i=0; i<imgFiles.length; i++) {
      preloadArray[i] = new Image;
      preloadArray[i].src = imgFiles[i];
    }
  }
 }
}

function MM_swapImage() { //v1.0
 if (validBrowser()) {
  var i,j=0,objStr,obj,swapArray=new Array,oldArray=document.MM_swapImgData;
  for (i=0; i < (MM_swapImage.arguments.length-2); i+=3) {
    objStr = MM_swapImage.arguments[(navigator.appName == 'Netscape')?i:i+1];
    if ((objStr.indexOf('document.layers[')==0 && document.layers==null) ||
        (objStr.indexOf('document.all[')   ==0 && document.all   ==null))
      objStr = 'document'+objStr.substring(objStr.lastIndexOf('.'),objStr.length);
    obj = eval(objStr);
    if (obj != null) {
      swapArray[j++] = obj;
      swapArray[j++] = (oldArray==null || oldArray[j-1]!=obj)?obj.src:oldArray[j];
      obj.src = MM_swapImage.arguments[i+2];
  } }
  document.MM_swapImgData = swapArray; //used for restore
 }
}

function validBrowser() {
  var agent = navigator.userAgent;
  var version = parseInt(navigator.appVersion);
  if( agent.indexOf('MSIE') != -1 ) {
    return (( 4 <= version ) ? true : false);
  }
  else {
    if ((agent.indexOf('Mozilla') != -1) && ( 3 <= version )) { return true; }
  }
  return false ;
}