Slider modifying sourece code

Hi everyone in the forum, i am simply trying to add into the faceted search an slider with a range, like ebay or atrapalo, for filtering the post by date (as soon as i visualize the slider), but i am not good enough to do it. Anyone could help me? Thanks in advanced.

$returnstring .= ‘
<style> demo-frame > div.demo { padding: 10px !important; }; </style>
<script>
$(function() { $( “#slider-range” ).slider({
range: true, min: 0, max: 500, values: [ 75, 300 ], 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>

<div class=”demo”>

<p>
<label for=”amount”>Rango Fechas:</label>
<input type=”text” id=”amount” style=”border:0; color:#f6931f; font-weight:bold;” />
</p>
<div id=”slider-range”></div>
</div>’