Я синхронизировал ввод с ползунком вот так
<div id='support_slider' class='slider' alt='" + pct + "'></div>
<input id='support_input' class='input' alt='" + pct + "' value='" + pct + "' size='1'/>
$("#support_slider").slider({
//animate: true,
min: 0,
max: 10,
value: pct,
slide: function(event, ui) {
set_sliders_and_input($(this), $(this).next(), $(this).next().attr("value"), ui.value);
}
});
$("#support_input").keyup(function(event) {
set_sliders_and_input($(this).prev(), $(this), $(this).attr("alt"), $(this).attr("value"));
});
function set_sliders_and_input(slider, input, oldv, newv) {
if ( newv < 0 || newv > 100 ) return false;
var diff = oldv - newv;
input.attr("value", newv).attr("alt", newv);
slider.slider('option', 'value', newv);
GM_setValue('support_pct', newv);
return true;
}