jquery UI issue with form submission

I have the following form inside the jquery UI and when i try to submit it, my alert is coming as empty

please guide why

my Form Page:

 <form id="formcountry" class="icountry" name="formcountry">
        <label>Country Name</label>
        <input type="text" id="Country" class="input-block-level" name="Country" placeholder="Country Name">
        <span class="help-block">Type Country Name as [USA, India, Canada].</span>
        <label>Country Code</label>
        <input type="text" id="countrycode" class="input-large" name="countrycode" placeholder="Country Code">
        <label>Status</label>
        <select name="status" id="status">
          <option value="Yes">Visible</option>
          <option value="No">Hidden</option>
        </select>
        <br>
        <input type="button" class="btn submitcountry" name="submit" id="submit" value="Submit">
        <input type="hidden" name="ID" value="1" id="ID" />
        <input type="hidden" name="old_Country" value="" id="old_Country" />
      </form>

my jquery UI Code

$('#ui-tabs-3').on('click','.submitcountry',function() {
        var dataString = $("form").serialize();
        alert(dataString);
        $.ajax({
            type:"POST",
            url:"save.cfm?mode=countryadd",
            cache:false,
            data:dataString,
            success:function(result) {
            var i = $("#AddCountry").html(result);
           alert(i);
         }
     });
 });

i have the jquery ui is the 3rd tab, when i click submit. it is just showing me empty alert rather than a form values, please guide why it is wrong

Thanks