// JavaScript Document
function mostrar_menu(id_menu){
	var a;
	a=document.getElementById(id_menu);
	a.style.display="block";
}

function objetoAjax(){
        var xmlhttp=false;
        try {
               xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
               try {
                  xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
               } catch (E) {
                       xmlhttp = false;
               }
        }
 
        if (!xmlhttp && typeof XMLHttpRequest!='undefined') {

               xmlhttp = new XMLHttpRequest();


        }
        return xmlhttp;
}