var http_request = false;
	var capa = false;

    function makeRequest(url, idCapa) {
		capa = document.getElementById(idCapa);
		capa.innerHTML = 'Cargando...';
        http_request = false;

        if (window.XMLHttpRequest) { // Mozilla, Safari,...
            http_request = new XMLHttpRequest();
            if (http_request.overrideMimeType) {
                http_request.overrideMimeType('text/xml');
                // Ver nota sobre esta linea al final
            }
        } else if (window.ActiveXObject) { // IE
            try {
                http_request = new ActiveXObject("Msxml2.XMLHTTP");
            } catch (e) {
                try {
                    http_request = new ActiveXObject("Microsoft.XMLHTTP");
                } catch (e) {}
            }
        }

        if (!http_request) {
            alert('Error. No es posible crear una instancia XMLHTTP');
            return false;
        }
		http_request.onreadystatechange = actualizarCapa;
        http_request.open('GET', url, true);
        http_request.send(null);
    }

    function actualizarCapa() {
		var div1 = '<div id="' + capa.id + '">';
		var div2 = '</div>';

        if (http_request.readyState == 4) {
            var text;
			if (http_request.status == 200) {
				//text = sacarScripts(http_request.responseText);
				text = http_request.responseText;
			} else {
				text = 'Error ' + http_request.status + ': ' + http_request.statusText;
            }
			capa.innerHTML = text;
        }
    }
	
	function sacarScripts(cadena) {
		var indice1 = cadena.toLowerCase().indexOf('<script');
		var indice2 = cadena.indexOf('>', indice1) + 1;
		var indice3 = cadena.toLowerCase().indexOf('</script>', indice2);
		var indice4 = indice3 + 9;

		if (indice1 != -1 && indice2 != -1 && indice3 != -1) {
			var cadenaAnt = cadena.substring (0, indice1);
			var script = cadena.substring (indice2, indice3);
			var cadenaPos = cadena.substring (indice4);
			var e = document.createElement("script");
			e.setAttribute("language", "javascript");
			e.text = script;
			capa.appendChild(e);
			return cadenaAnt + sacarScripts(cadenaPos);
		}
		return cadena;
	}