var submitted = false;

function validateSubmit() {
    if (submitted) {
        return false;  // don't submit form
    } else {
        submitted = true;
        return true; // submit form
    }
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

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) { //v3.0
  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); 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];}
}

function popup (url) {
  window.open(url, 'new', 'scrollbars=yes, width=420, height=375');
}

function isEmpty(element) {

	var isChecked;

 	for (i=0; i<element.length;i++) 
	{ 
 		if (element[i].checked == true) {
 			return false;
 		}
 	}

	return true;
}

function clearNoneOfTheAboveBox() {
	var n = document.getElementById("noneOfTheAbove");
	if (n != null) {
		n.checked = false;
	}
}

function clearOtherBoxes(obj) {
    var elements = document.forms[0].elements;
    var i = 0;

    while(elements[i]) {
        if(elements[i] == obj && elements[i].checked == true) {
            elements[i].checked = true;
        } else {
            elements[i].checked = false;
        }
        i++;
    }
}

function getDate() {

   <!-- Hide this from older browsers

  var today = new Date();
  var week, month;

  switch (today.getDay()) {
    case 0:
      week = "Domingo";
      break;
    case 1:
      week = "Lunes";
      break;
    case 2:
      week = "Martes";
      break;
    case 3:
      week = "Mi&eacute;rcoles";
      break;
    case 4:
      week = "Jueves";
      break;
    case 5:
      week = "Viernes";
      break;
    case 6:
      week = "S&aacute;bado";
      break;
  }

  switch (today.getMonth()) {
    case 0:
      month = "enero";
      break;
    case 1:
      month = "febrero";
      break;
    case 2:
      month = "marzo";
      break;
    case 3:
      month = "abril";
      break;
    case 4:
      month = "mayo";
      break;
    case 5:
      month = "junio";
      break;
    case 6:
      month = "julio";
      break;
    case 7:
      month = "agosto";
      break;
    case 8:
      month = "septiembre";
      break;
    case 9:
      month = "octubre";
      break;
    case 10:
      month = "noviembre";
      break;
    case 11:
      month = "diciembre";
      break;
  }

  var theYear = today.getYear();

  if (theYear < 2000)
  {
      theYear = theYear + 1900;
  }
  
  document.write (week + ", " + today.getDate() + " de " + month + " de " + theYear);

  // end hide -->

}