Google map not displayed

It used to work just fin开发者_开发问答e ... But recently I've just changed my wordpress theme, and not the google map isn't displayed anymore. And I can't figure out why ...

Here is the link for the search form: http://www.propertycrunch.co.uk/properties-search/ Enter an address and click find. It will list the properties, but the map won't appear ...

I can't figure out why :-(

Any idea are more than welcome ...

Thanks a lot.

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Uncaught TypeError: Object # has no method 'slider' in /properties-result/:126

<!--  TEST JQUERY UI Slider -->
<meta charset="utf-8">

<script>
    $(function() {
        $( "#slider-range" ).slider({

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$("#slider-range").slider is not a function
[Break On This Error] slide: function( event, ui ) { 

Line 131. There is no slider included.