// JavaScript Document
var peticion = false;
 if (window.XMLHttpRequest) {
        peticion = new XMLHttpRequest();
        } else if (window.ActiveXObject) {
              peticion = new ActiveXObject("Microsoft.XMLHTTP");
 }
 
 
//funcion para cargar los datos en el DIV que le indiquemos
function ObtenerDatos(datos,divID,cache) {
if(peticion) {
     var obj = document.getElementById(divID);
     var aleatorio=Math.random();
	 if (cache == "yes"){
	 	peticion.open("GET", datos+"&nocache="+aleatorio);
	 }else{
		peticion.open("GET", datos); 
	 }
	 peticion.onreadystatechange = function()  {
          if (peticion.readyState == 4) {
               obj.innerHTML = peticion.responseText;
          }
     }
peticion.send(null);
}
}


function CambiarEstilo(id) {
 var elementosMenu = getElementsByClassName(document, "li", "active");
 for (k = 0; k< elementosMenu.length; k++) {
 elementosMenu[k].className = "inactive";
 }
 var identity=document.getElementById(id);
 identity.className="active";
 }
  
 /*
     function getElementsByClassName
     Written by Jonathan Snook, http://www.snook.ca/jonathan
     Add-ons by Robert Nyman, http://www.robertnyman.com
 */
  
 function getElementsByClassName(oElm, strTagName, strClassName){
     var arrElements = (strTagName == "*" && document.all)? document.all : oElm.getElementsByTagName(strTagName);
     var arrReturnElements = new Array();
     strClassName = strClassName.replace(/\-/g, "\\-");
     var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
     var oElement;
     for(var i=0; i<arrElements.length; i++){
         oElement = arrElements[i];     
         if(oRegExp.test(oElement.className)){
             arrReturnElements.push(oElement);
         }   
     }
     return (arrReturnElements)
 }