Take a look at this example.
$("#slider").slider({
values:[1,1],
min:0,
max:5,
slide: function(event, ui) {
$(ui.handle).text(ui.value);
},
start: function( event, ui ) {
if($(ui.handle).hasClass('stay'))
return false;
}
});
var value = $("#slider").slider("values",0);
$("#slider").find(".ui-slider-handle").text(value);
$('#slider .ui-slider-handle:last').addClass('stay');