var NS4=((parseInt(navigator.appVersion)>=4)&&(navigator.appName.indexOf("Netscape")!=-1));
var IE4=((parseInt(navigator.appVersion)>=4)&&(navigator.appName.indexOf("Explorer")!=-1));
var layerObj=(NS4)?'document':'document.all';
var styleObj=(NS4)?'':'.style';
var amagat=(NS4)?'hide':'hidden';
var es_visible=(NS4)?'show':'visible';


function activa(capa) {
	obj=eval(layerObj+'["'+capa+'"]'+styleObj);
	if (NS4) obj.top=window.pageYOffset+100;
	else obj.pixelTop=document.body.scrollTop+100;
	obj.visibility=es_visible;}
	
function desactiva(capa) {
	obj=eval(layerObj+'["'+capa+'"]'+styleObj);
	obj.visibility=amagat;}
	
function popup(pagina,titulo,ancho,alto){
	window.open(pagina,titulo,'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,width='+ancho+',height='+alto+'');}
	
function nuevaventana(pagina,nomFinestra){
	window.open(pagina,nomFinestra,'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width=350,height=260');}

function calendario(pagina,nomFinestra){
	window.open(pagina,nomFinestra,'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=1,width=620,height=900');}

	
function getCookie(name){
  var cname = name + "=";               
  var dc = document.cookie;             
  if (dc.length > 0) {              
    begin = dc.indexOf(cname);       
    if (begin != -1) {           
      begin += cname.length;       
      end = dc.indexOf(";", begin);
      if (end == -1) end = dc.length;
        return unescape(dc.substring(begin, end));
    } 
  }
  return null;
}

function setCookie(name, value, expires, path, domain, secure) {
  document.cookie = name + "=" + escape(value) + 
  ((expires == null) ? "" : "; expires=" + expires.toGMTString()) +
  ((path == null) ? "" : "; path=" + path) +
  ((domain == null) ? "" : "; domain=" + domain) +
  ((secure == null) ? "" : "; secure");
}

function delCookie (name,path,domain) {
  if (getCookie(name)) {
    document.cookie = name + "=" +
    ((path == null) ? "" : "; path=" + path) +
    ((domain == null) ? "" : "; domain=" + domain) +
    "; expires=Thu, 01-Jan-70 00:00:01 GMT";
  }
}
//-->