function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
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];}
}

var whitespace = " \t\n\r";

function Vacio(s)
{   return ((s == null) || (s.length == 0))
}


function EnBlanco(s)

{   var i;

    // Is s empty?
    if (Vacio(s)) return true;

    // Search through string's characters one by one
    // until we find a non-whitespace character.
    // When we do, return false; if we don't, return true.

    for (i = 0; i < s.length; i++)
    {   
	// Check that current character isn't whitespace.
	var c = s.charAt(i);

	if (whitespace.indexOf(c) == -1) return false;
    }

    // All characters are whitespace.
    return true;
}


function buscador()
{
	if (!EnBlanco(document.buscador.txtpalabra.value))
	{
		document.buscador.txtpalabra.value=document.buscador.txtpalabra.value.toLowerCase()
		document.buscador.submit();
	}
}

function buscadorLocal(txt)
{
	
		if (EnBlanco(document.buscadorLocal.txtpalabra.value))
		{
			window.alert(txt);
			document.buscadorLocal.txtpalabra.focus();
			document.buscadorLocal.txtpalabra.select();
			}
		else
			document.buscadorLocal.submit();
	
}

function buscadorAvanz(txt1,txt2)
{
	var intTotal;
	var booSel;
	var i;
	booSel= false;
	validar = true;
	
	if (EnBlanco(document.buscadorA.txtpalabra.value))
	{
		window.alert(txt1);
		document.buscadorA.txtpalabra.focus();
		document.buscadorA.txtpalabra.select();
		validar=false;
	}
	
	intTotal = document.buscadorA.chkGrupos.length;
	
	for (i=0; i< intTotal; i++)
	{
		if (document.buscadorA.chkGrupos[i].checked)
			booSel= true;
	}
	
	if (!booSel)
	{
		window.alert(txt2);
		validar=false;
	}
	if (validar){
		document.buscadorA.txtpalabra.value=document.buscadorA.txtpalabra.value.toLowerCase();
		document.buscadorA.submit();
	}
}