function mostrarPanelBeta(){
    var panel = new YAHOO.widget.Panel("panel_beta", {
        width: "400px",
        constraintoviewport: true,
        close: true,
        visible: true,
        modal: true,
        fixedcenter: true,
        draggable: false
    });
    panel.setHeader(header_beta);
    if(body_beta && body_beta!=""){
        panel.setBody(body_beta);
    }
    panel.render(document.body);
}