function InvPreloadImages() {
  if (document.images) {

	fondo = new Image();
	fondo.src = "images/acercade/fondo.gif";

	intercambio = new Image();
	intercambio.src = "images/acercade/intercambio.gif";
	
	memorandum = new Image();
	memorandum.src = "images/acercade/memorandum.gif";

	parcelas = new Image();
	parcelas.src = "images/acercade/parcelas.gif";

	fichas = new Image();
	fichas.src = "images/acercade/fichas.gif";
	
	preguntas = new Image();
	preguntas.src = "images/acercade/preguntas.gif";

	bases = new Image();
	bases.src = "images/acercade/memorandum.gif";

  }
}

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

function MM_swapImgRestore() { //v1.0
  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];
}