function SoloFecha(evt) {
    var keyPressed = (evt.which) ? evt.which : event.keyCode
//    alert(keyPressed);
    return (!(keyPressed > 31 && (keyPressed < 48 || keyPressed > 57)) || keyPressed == 45 || keyPressed == 8);
}

 /*
  Aceta solo Numeros
  Author: Alejandro Parra
 */
  function SoloNumberos(evt)
  {
    var keyPressed = (evt.which) ? evt.which : event.keyCode
    return !(keyPressed > 31 && (keyPressed < 48 || keyPressed > 57));
  }
  //-->

 
 /*
  No Aceta Numeros
  Author: Alejandro Parra
 */
  function NoNumberos(evt)
  {
    var keyPressed = (evt.which) ? evt.which : event.keyCode
    return (keyPressed == 8 || keyPressed == 32 || keyPressed == 39 || keyPressed == 225 || keyPressed == 233 || keyPressed == 237 || keyPressed == 243 || keyPressed == 250 || keyPressed == 193 || keyPressed == 201 || keyPressed == 205 || keyPressed == 211 || keyPressed == 218 || (keyPressed < 123 && keyPressed > 96) || (keyPressed < 91 && keyPressed > 64) );
  }
  //-->


 
 /*
  No Aceta Tags
  Author: Alejandro Parra
 */
  function NoTags(evt)
  {
      var keyPressed = (evt.which) ? evt.which : event.keyCode
      //alert(keyPressed);
      return ((keyPressed >= 49 && keyPressed <= 57) || (keyPressed >= 97 && keyPressed <= 122) || (keyPressed >= 65 && keyPressed <= 90) || keyPressed == 32 || keyPressed == 8 || keyPressed == 225 || keyPressed == 233 || keyPressed == 237 || keyPressed == 243 || keyPressed == 250 || keyPressed == 193 || keyPressed == 201 || keyPressed == 205 || keyPressed == 211 || keyPressed == 218 || keyPressed == 220 || keyPressed == 252)
    
    
  }
  //-->
  
  
 /*
  Aceta solo Mails
  Author: Alejandro Parra
 */
  function SoloMail(evt)
  {
    var keyPressed = (evt.which) ? evt.which : event.keyCode
    //alert(keyPressed);
    return (keyPressed == 8 ||keyPressed == 45 || keyPressed == 46 || keyPressed == 95 || keyPressed == 64 || keyPressed == 39 || keyPressed == 225 || keyPressed == 233 || keyPressed == 237 || keyPressed == 243 || keyPressed == 250 || keyPressed == 193 || keyPressed == 201 || keyPressed == 205 || keyPressed == 211 || keyPressed == 218 || (keyPressed < 123 && keyPressed > 96) || (keyPressed < 91 && keyPressed > 64) || (keyPressed < 58 && keyPressed > 47)  );  
  }
  //-->
  
  
  /*
  Aceta solo Mails
  Author: Alejandro Parra
 */
  function SoloMailCorto(evt)
  {
    var keyPressed = (evt.which) ? evt.which : event.keyCode
    //alert(keyPressed);
    return (keyPressed == 8 || keyPressed == 45 || keyPressed == 46 || keyPressed == 95 || keyPressed == 32 || keyPressed == 39 || keyPressed == 225 || keyPressed == 233 || keyPressed == 237 || keyPressed == 243 || keyPressed == 250 || keyPressed == 193 || keyPressed == 201 || keyPressed == 205 || keyPressed == 211 || keyPressed == 218 || (keyPressed < 123 && keyPressed > 96) || (keyPressed < 91 && keyPressed > 64) || (keyPressed < 58 && keyPressed > 47)  );  
  }
  //-->


  function quitaInicial(obj, textoInicial) {

      if (obj.value == textoInicial)
          obj.value = '';

  }

  function ponInicial(obj, textoInicial) {
      if (obj.value == '')
          obj.value = textoInicial;
  }

  function muestraImagen(id, imagen) {
      var obj = document.getElementById(id);
      obj.src = imagen;
  }


  function ventana(direccion) {

      var ancho = 680;
      var alto = 750;
      var posX = (screen.width / 2) - (ancho / 2);
      var posY = (screen.height / 2) - (ancho / 2);
      var opciones = "fullscreen=" + 0 +
         ",toolbar=" + 0 +
         ",location=" + 0 +
         ",status=" + 0 +
         ",menubar=" + 0 +
         ",scrollbars=" + 1 +
         ",resizable=" + 0 +
         ",width=" + ancho +
         ",height=" + alto +
         ",left=" + posX +
         ",top=" + posY;
      var ventana = window.open(direccion, "venta", opciones, 0);

  }


//  var imagenes = new Array("imagen1.gif", "imagen2.gif", "imagen3.gif");


  function cargarImagenes(imagenes) {
      var lista_imagenes = new Array();
      var i;
      for (i in imagenes) {
          lista_imagenes[i] = new Image();
          lista_imagenes[i].src = imagenes[i];
      }
  }