$(function() {
    $("form#leafdataquery .latr input.form-control")
        .rules("add",
            {
                //required: true
                required: function ()
                {
                    return !!$(".lat input.form-control").val();
                },
                messages: {
                    required: "Enter +/- range of latitude"
                }
            });
    $("form#leafdataquery .lonr input.form-control")
        .rules("add",
            {
                //required: true
                required: function () {
                    return !!$(".lon input.form-control").val();
                },
                messages: {
                    required: "Enter +/- range of longitude"
                }
            });
});