jQuery(document).ready(function () {
    timingf1()
});

function timingf1() {
    var a = jQuery.ajax({
        url: 'data/do.html?' + Math.random(),
        timeout: 2000,
        async: false
    }).responseText;
    if (a != '') {
        jQuery('#lf1_timing').html(a);
        a = '';
        setTimeout("timingf1();", 2000)
    }
}