//funciones utiles javascript

function preCarga() { //creo que no funciona
  if (!document.images) return;
  var ar = new Array();
  var arguments = preCarga.arguments;
  for (var i = 0; i < arguments.length; i++) {
    ar[i] = new Image();
    ar[i].src = arguments[i];
  }
}

function fecha() {
  var mydate=new Date()
  var year=mydate.getYear()
  if (year < 1000)
	year+=1900
  var day=mydate.getDay()
  var month=mydate.getMonth()
  var daym=mydate.getDate()
  if (daym<10)
	daym="0"+daym
  var dayarray=new Array("Domingo","Lunes","Martes","Miércoles","Jueves","Viernes","Sábado")
  var montharray=new Array("Enero","Febrero","Marzo","Abril","Mayo","Junio","Julio","Agosto","Septiembre","Octubre","Noviembre","Diciembre")
  document.write("<font color='ffffff' size='-1' face='Arial'>"+dayarray[day]+" "+daym+" de "+montharray[month]+" de "+year+"</font>")
}

function loadImages() {
  if (document.getElementById) { // DOM3 = IE5, NS6
    document.getElementById('hidepage').style.visibility = 'hidden'; 
  }
  else {
    if (document.layers) { // Netscape 4
      document.hidepage.visibility = 'hidden';
    }
    else { // IE 4
      document.all.hidepage.style.visibility = 'hidden';
    }
  }
}

function hideLoadingPage() {
  if (document.getElementById) {  // DOM3 = IE5, NS6
    document.getElementById('hidepage').style.visibility = 'hidden';
  }
  else {
    if (document.layers) {  // Netscape 4
      document.hidepage.visibility = 'hidden';
    }
    else {  // IE 4
      document.all.hidepage.style.visibility = 'hidden';
    }
  }
}