Adding the Jquery to Theme File.

I am using locality Real Estate wordpress theme. I want to add jquery for Property Search Options.When I added the code here search options is working but site got some issues. Please take my site. Follwing Code I have used.

[ Moderator Note: Please post code or markup snippets between backticks or use the code button. ]

<script src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.8.0.js">
</script>
<script type="text/javascript">
$(window).load(function(){
var maxprice = $('#select-maxprice').html();
$('#select-minprice').change(function() {
$('#select-maxprice').html(maxprice);
$('#select-maxprice option').each(function() {
  if (parseInt($(this).val()) <= parseInt($('#select-minprice').val())) $(this).remove();
});
});
})

</script>

Can You please any One help me to Fix this Issue.??