function mostrarReloj () {
	window.parent.frames(0).document.all("gris").style.visibility = 'hidden';
	window.parent.frames(0).document.all("capa_reloj").style.visibility = '';
	window.parent.frames(0).document.all("cacharro").style.visibility = 'hidden';
	window.parent.frames(0).document.all("negro").style.visibility = 'hidden';
}

function limpiar () {
	window.parent.frames(0).document.all("gris").style.visibility = '';
	window.parent.frames(0).document.all("capa_reloj").style.visibility = 'hidden';
	window.parent.frames(0).document.all("cacharro").style.visibility = 'hidden';
	window.parent.frames(0).document.all("negro").style.visibility = 'hidden';
}

function mostrarCacharro () {
	window.parent.frames(0).document.all("gris").style.visibility = 'hidden';
	window.parent.frames(0).document.all("capa_reloj").style.visibility = 'hidden';
	window.parent.frames(0).document.all("cacharro").style.visibility = '';
	window.parent.frames(0).document.all("negro").style.visibility = 'hidden';
}

function hacerNegro () {
	window.parent.frames(0).document.all("gris").style.visibility = 'hidden';
	window.parent.frames(0).document.all("capa_reloj").style.visibility = 'hidden';
	window.parent.frames(0).document.all("cacharro").style.visibility = 'hidden';
	window.parent.frames(0).document.all("negro").style.visibility = '';
}

function ocultar() {
   window.parent.frames(0).document.all("aqui").style.visibility = "hidden";
}

var pa;
var com;

function comenzar() {
   window.parent.frames(0).document.all("alli").innerText="Tiempo Restante:";
   setTimeout("reloj(2400,2400)",1000);
}

function reloj (parcial, completo) {
   pa=parcial;
   com=completo;
   if (pa==0) {
      window.alert("tiempo agotado") ;
      window.parent.frames(0).document.all("aqui").innerText="";
      la.submit();
   } else {
      if (pa<=com && pa>com/2)
         window.parent.frames(0).document.all("aqui").style.color="#00ff40";
      if (pa<=com/2 && pa>10)
         window.parent.frames(0).document.all("aqui").style.color="#ff8040";
      if (pa<=10)
         window.parent.frames(0).document.all("aqui").style.color="#ff0000";
      pa=pa-1;

      var minuto=Math.floor(pa/60);
      var segundo=pa % 60;
      var textohora="";

      if (minuto < 10)
         textohora="0"+minuto+":";
      else
         textohora=minuto+":";

      if (segundo < 10)
         textohora=textohora+"0"+segundo;
      else
         textohora=textohora+segundo;

      window.parent.frames(0).document.all("aqui").innerText=textohora;
      window.parent.frames(0).document.all("aqui").style.visibility="visible";
      setTimeout("ocultar()", 500);
      window.parent.frames(0).document.all("aqui").style.visibility="visible";

      setTimeout("reloj(pa,com)", 1000);
   }
}