var passingYearStart = 1970;
var passingYearEnd = new Date().getFullYear();
var yearPassing = passingYearEnd - passingYearStart;
var yearDropDown = '';
for (let year = passingYearStart; year <= passingYearEnd ; year++) { yearDropDown += ``;
}
jQuery('#f_l_input select').html(yearDropDown);
