[jQuery] UI slider execute function on change or slide

[Mircea]

Hi,
I want to make the UI slider to set a font-size to a .cica class. The
setfontsize variable works but I can not succeed to make the slider
change the value on slide.

Here is the function

$('#sizer').slider({
   slide: function(event, ui) {
           var setfontsize = $('#sizer:selected').text();
            $('.cica').css("font-size", setfontsize + "px");
            }

Here is the markup

<form action="#">
                <!-- Slider -->
                <fieldset>
                        <select name="speed" id="speed">
                                <option value="10">10</option>
                                <option value="15">15</option>
                                <option value="21" 
selected="selected">21</option>
                                <option value="30">30</option>
                                <option value="40">40</option>
                        </select>
                </fieldset>
        </form>

Thank you.