esq = Array()
esq[0] = document.createElement("IMG")
esq[0].src = '/images/esq-si.gif'  
esq[1] = document.createElement("IMG")
esq[1].src = '/images/esq-sd.gif'  
esq[2] = document.createElement("IMG")
esq[2].src = '/images/esq-ii.gif'  
esq[3] = document.createElement("IMG")
esq[3].src = '/images/esq-id.gif'  
im = Array()
function preload_images() {
  botones = Array('informacion', 'contratar','cambiate', '5-razones', 'contacto', 'foros', 'afiliados', 'directorio', 'ayuda', 'contratar-resaltado')
  for (i = 0; i < botones.length; i++) {
    im[2*i]       = document.createElement("IMG")
    im[2*i].src   = '/images/b-' + botones[i] + '-0.gif'
    im[2*i+1]     = document.createElement("IMG")
    im[2*i+1].src = '/images/b-' + botones[i] + '-1.gif'
  }
}

function highlight(o)
{
  o.src = o.src.replace(/0\./, '1.')
}

function downlight(o)
{
  o.src = o.src.replace(/1\./, '0.')
}