how do use jquery for price sorting

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PHP

jQuery

Hello I have Error in my code can.i am trying to sort product using price range but jQuery gives type error.
My jQuery function if=s below

<script type="text/javascript">
$(function() {
debugger;
    $( "#slider-range" ).slider({
      range: true,
      min: 0,
      max: 1000,
      values: [ <?php echo $min; ?>, <?php echo $max; ?> ],
      slide: function( event, ui ) {
        $( "#amount" ).val( "$" + ui.values[ 0 ] + " - $" + ui.values[ 1 ] );
      }
    });
    $( "#amount" ).val( "$" + $( "#slider-range" ).slider( "values", 0 ) +
      " - $" + $( "#slider-range" ).slider( "values", 1 ) );
  });
</script>

In above code it gives me error like

TypeError: $(...).slider is not a function

Please help to solve this