var timerID = null;
var timerRunning = false;

function stopclock ()
{
  if(timerRunning)
     clearTimeout(timerID);
  timerRunning = false;
}

function showtime () 
{
  var now = new Date();
  var hours = now.getHours();
  var minutes = now.getMinutes();
  var seconds = now.getSeconds()

  var timeValue = "" + ((hours >12) ? hours -12 :hours)
  timeValue += ((minutes < 10) ? ":0" : ":") + minutes
  timeValue += ((seconds < 10) ? ":0" : ":") + seconds
  timeValue += (hours >= 12) ? " P.M." : " A.M."
  document.reloj.caratula.value = timeValue;
  // window.status = timeValue;  para la barra de estatus si lo quieres
  timerID = setTimeout("showtime()",1000);
  timerRunning = true;
}

function startclock () 
{
  stopclock();
  showtime();
}


function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}