当input正在获得焦点时停2s在请求
var timeoutId = 0;
$('#id').off('keyup').on('keyup', function (event) {
clearTimeout(timeoutId);
timeoutId = setTimeout(function () {
$.ajax({
type: 'POST',
url: 'admin/usermanager/validName',
data: {'id': $('#id').val()},
success: function (re) {
//do something
}
});
}, 2000);
});