// flexible ajax library
        // author: clemens krack - ckrack@gmail.com - http://tripdown.de
        var flxajax_request_type = "GET";
        
        function flxajax_init_object() {
        
        var A;
        try {
            A=new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
        try {
            A=new ActiveXObject("Microsoft.XMLHTTP");
        } catch (oc) {
            A=null;
        }
        }
        if(!A && typeof XMLHttpRequest != "undefined")
            A = new XMLHttpRequest();
            return A;
        }
        function flxajax_do_call(func_name, args) {
        var i, x, n;
        var uri;
        var post_data;
        
        uri = "/scripts/ajax.php";
        if (flxajax_request_type == "GET") {
            if (uri.indexOf("?") == -1) 
                uri = uri + "?rs=" + escape(func_name);
            else
                uri = uri + "&rs=" + escape(func_name);
                
            for (i = 0; i < args.length-1; i++) 
                uri = uri + "&rsargs[]=" + escape(args[i]);
            uri = uri + "&rsrnd=" + new Date().getTime();
            post_data = null;
        } else {
            post_data = "rs=" + escape(func_name);
            for (i = 0; i < args.length-1; i++) 
                post_data = post_data + "&rsargs[]=" + escape(args[i]);
        }
        
        x = flxajax_init_object();
        x.open(flxajax_request_type, uri, true);
        if (flxajax_request_type == "POST") {
            x.setRequestHeader("Method", "POST " + uri + " HTTP/1.1");
            x.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
            x.setRequestHeader("Content-length",post_data.length); 
            x.setRequestHeader("Connection","close");
        }
        x.onreadystatechange = function() {
        if (x.readyState != 4) 
            return;
        
        var status;
        var data;
        status = x.responseText.charAt(0);
        data = x.responseText.substring(2);
        if (status == "-") 
            alert("Error: " + data);
        else  
            args[args.length-1](data);
        }
        x.send(post_data);
        delete x;
        }        
        // wrapper for ValidarUsuario
        function x_ValidarUsuario() {
            flxajax_do_call("ValidarUsuario", x_ValidarUsuario.arguments);
        }        
        // wrapper for CargarComboProductos
        function x_CargarComboProductos() {
            flxajax_do_call("CargarComboProductos", x_CargarComboProductos.arguments);
        }        
        // wrapper for CargarProvincia
        function x_CargarProvincia() {
            flxajax_do_call("CargarProvincia", x_CargarProvincia.arguments);
        }        
        // wrapper for CargarLocalidad
        function x_CargarLocalidad() {
            flxajax_do_call("CargarLocalidad", x_CargarLocalidad.arguments);
        }        
        // wrapper for CargarSubcategoria
        function x_CargarSubcategoria() {
            flxajax_do_call("CargarSubcategoria", x_CargarSubcategoria.arguments);
        }