function efecto_block(){

            $.blockUI({
            overlayCSS: { backgroundColor: '#000000' },
            baseZ: 900010,
            message: "<h3 style='color:white'>Espera un momento...</h3>",
            css: {
            border: '1px solid red',
            padding: '15px',
            sbackgroundColor: '#000',
            '-webkit-border-radius': '10px',
            '-moz-border-radius': '10px',
            opacity: .9,
            color: '#660000',
            backgroundColor: '#660000',
            cursor: 'wait' }
        });
        
    }