//Pre-Cargador de imágenes 

var aImOn = new Array();
var aImOff = new Array();

function addImg(sImg,sOn,sOff) {
  aImOn[sImg] = new Image();
  aImOn[sImg].src = sOn;
  aImOff[sImg] = new Image();
  aImOff[sImg].src = sOff;
  }

function imgOn(oIm) {
  sIm = oIm.name;
  oIm.src = aImOn[sIm].src;
  }

function imgOff(oIm) {
  sIm = oIm.name;
  oIm.src = aImOff[sIm].src;
  }

function imgOnMulti(oIm) {
  if ( (iPos = oIm.name.lastIndexOf("_")) > 0) {
    sIm = oIm.name.substring(0, iPos);
    oIm.src = aImOn[sIm].src;
    }
  }

function imgOffMulti(oIm) {
  if ( (iPos = oIm.name.lastIndexOf("_")) > 0) {
    sIm = oIm.name.substring(0, iPos);
    oIm.src = aImOff[sIm].src;
    }
  }

function setCurrent(sImg) {
	if (typeof aImOff[sImg] != 'undefined') {
		aImOff[sImg].src = aImOn[sImg].src;
		document.images[sImg].src = aImOn[sImg].src;
	}
}

//Imágenes a pre-cargar (id,on,off)
//addImg('ued1','/images/ued1.gif','/images/futbol1.gif');
//addImg('ued2','/images/ued2.gif','/images/futbol2.gif');