update label on slidr

I'm able to modify slider value set by:
            objectid="#slider2";
            $(objectid).val(set);
            $(objectid).slider('refresh');
but the number over slider doesn't change
<form class="full-width-slider">
<input id="slider1" data-popup-enabled="true" data-show-value="true" min="0" max="100" step=5 type="range"/>
</form>
someone know how i can do it?