function AJAXCrearObjeto(){
         var obj;
         if(window.XMLHttpRequest) { // no es IE
            obj = new XMLHttpRequest();
         } else { // Es IE o no tiene el objeto
            try {
                obj = new ActiveXObject("Microsoft.XMLHTTP");
            }catch (e) {
                alert('El navegador utilizado no está soportado');
            }
        }
        return obj;
    }


    oXML = AJAXCrearObjeto();


        // preparamos la peticion
        oXML.open('GET', 'noticias/noticias.xml');
        // preparamos la peticion
        oXML.onreadystatechange = leerDatos;
        // Realizamos la petición
        oXML.send('');


    /*Example message arrays for the two demo scrollers*/

    var pausecontent=new Array();

    function leerDatos()
    {
        if (!oXML) exit(0);
        if (oXML.readyState == 4) {
            // Accedemos al XML recibido
            var xml = oXML.responseXML.documentElement;
        }

        if (oXML.readyState == 4)
            for (i = 0; i < xml.getElementsByTagName('noticia').length; i++){
                // Accedemos al objeto XML noticia
                var item = xml.getElementsByTagName('noticia')[i];
                // Recojemos la imagen
                var imagen = item.getElementsByTagName('imagen')[0].firstChild.data;
                // Recojemos la descripcion
                var descripcion = item.getElementsByTagName('descripcion')[0].firstChild.data;
                // Recojemos el link
                var link = item.getElementsByTagName('link')[0].firstChild.data;
                // Recojemos la fecha
                var fecha = item.getElementsByTagName('fecha')[0].firstChild.data;
                // Mostramos la noticia
                if (!item)
                    pausecontent[i] = '<k>Revise el fichero xml de noticias.</k>'
                else
                    pausecontent[i] = '<center><img alt="'+ 'imagen' + '" width="162" height="59" src="noticias/img/' + imagen + '" /></center>' + '<div style="padding:10px;"><b>' + fecha + '</b>:  ' + descripcion + '<br/></div>'; // + 
					//'<div style="text-align:right;"><a href=?noticia=' + link + '>Leer m&aacute;s</a></div></div>';
            }
        else
        {
            // alert("NO se cargo");
        }
    }


    /***********************************************
    * Pausing up-down scroller- © Dynamic Drive (www.dynamicdrive.com)
    * This notice MUST stay intact for legal use
    * Visit http://www.dynamicdrive.com/ for this script and 100s more.
    ***********************************************/

    function pausescroller(content, divId, divClass, delay){
        this.content=content; //message array content
        this.tickerid=divId; //ID of ticker div to display information
        this.delay=delay; //Delay between msg change, in miliseconds.
        this.mouseoverBol=0; //Boolean to indicate whether mouse is currently over scroller (and pause it if it is)
        this.hiddendivpointer=1; //index of message array for hidden div
        document.write('<div id="'+divId+'" class="'+divClass+'" style="position: relative; overflow: hidden"><div class="innerDiv" style="position: absolute; width: 200px" id="'+divId+'1">'+content[0]+'</div><div class="innerDiv" style="position: absolute; width: 200px; visibility: hidden" id="'+divId+'2">'+content[1]+'</div></div>');
        var scrollerinstance=this;
        if (window.addEventListener) //run onload in DOM2 browsers
            window.addEventListener("load", function(){scrollerinstance.initialize()}, false)
        else if (window.attachEvent) //run onload in IE5.5+
            window.attachEvent("onload", function(){scrollerinstance.initialize()})
        else if (document.getElementById) //if legacy DOM browsers, just start scroller after 0.5 sec
            setTimeout(function(){scrollerinstance.initialize()}, 500);
    }

    // -------------------------------------------------------------------
    // initialize()- Initialize scroller method.
    // -Get div objects, set initial positions, start up down animation
    // -------------------------------------------------------------------

    pausescroller.prototype.initialize = function(){
        this.tickerdiv=document.getElementById(this.tickerid);
        this.visiblediv=document.getElementById(this.tickerid+"1");
        this.hiddendiv=document.getElementById(this.tickerid+"2");
        this.visibledivtop=parseInt(pausescroller.getCSSpadding(this.tickerdiv));
        //set width of inner DIVs to outer DIV's width minus padding (padding assumed to be top padding x 2)
        this.visiblediv.style.width=this.hiddendiv.style.width=this.tickerdiv.offsetWidth-(this.visibledivtop*2)+"px";
        this.getinline(this.visiblediv, this.hiddendiv);
        this.hiddendiv.style.visibility="visible";
        var scrollerinstance=this;
        document.getElementById(this.tickerid).onmouseover=function(){scrollerinstance.mouseoverBol=1};
        document.getElementById(this.tickerid).onmouseout=function(){scrollerinstance.mouseoverBol=0};
        if (window.attachEvent) //Clean up loose references in IE
            window.attachEvent("onunload", function(){scrollerinstance.tickerdiv.onmouseover=scrollerinstance.tickerdiv.onmouseout=null});
        setTimeout(function(){scrollerinstance.animateup()}, this.delay);
    }


    // -------------------------------------------------------------------
    // animateup()- Move the two inner divs of the scroller up and in sync
    // -------------------------------------------------------------------

    pausescroller.prototype.animateup=function(){
        var scrollerinstance=this;
        if (parseInt(this.hiddendiv.style.top)>(this.visibledivtop+5)){
            this.visiblediv.style.top=parseInt(this.visiblediv.style.top)-5+"px";
            this.hiddendiv.style.top=parseInt(this.hiddendiv.style.top)-5+"px";
            setTimeout(function(){scrollerinstance.animateup()}, 50);
        }else{
            this.getinline(this.hiddendiv, this.visiblediv);
            this.swapdivs();
            setTimeout(function(){scrollerinstance.setmessage()}, this.delay);
        }
    }

    // -------------------------------------------------------------------
    // swapdivs()- Swap between which is the visible and which is the hidden div
    // -------------------------------------------------------------------

    pausescroller.prototype.swapdivs=function(){
        var tempcontainer=this.visiblediv;
        this.visiblediv=this.hiddendiv;
        this.hiddendiv=tempcontainer;
    }

    pausescroller.prototype.getinline=function(div1, div2){
        div1.style.top=this.visibledivtop+"px";
        div2.style.top=Math.max(div1.parentNode.offsetHeight, div1.offsetHeight)+"px";
    }

    // -------------------------------------------------------------------
    // setmessage()- Populate the hidden div with the next message before it's visible
    // -------------------------------------------------------------------

    pausescroller.prototype.setmessage=function(){
        var scrollerinstance=this;
        if (this.mouseoverBol==1) //if mouse is currently over scoller, do nothing (pause it)
            setTimeout(function(){scrollerinstance.setmessage()}, 100)
        else{
            var i=this.hiddendivpointer;
            var ceiling=this.content.length;
            this.hiddendivpointer=(i+1>ceiling-1)? 0 : i+1;
            this.hiddendiv.innerHTML=this.content[this.hiddendivpointer];
            this.animateup();
        }
    }


    pausescroller.getCSSpadding=function(tickerobj){ //get CSS padding value, if any
        if (tickerobj.currentStyle)
            return tickerobj.currentStyle["paddingTop"]
        else if (window.getComputedStyle) //if DOM2
            return window.getComputedStyle(tickerobj, "").getPropertyValue("padding-top")
        else
            return 0;
    }

    function hola()
    {
        alert("aaaas");
    }