two jquery in one html, one dropdown menu another one slider not workin slider

two jquery in one html, one dropdown menu another one slider not workin slider

this is slider
<script type="text/javascript" language="javascript" src="js/jquery-1.6.3.min.js"></script>
<script type="text/javascript" language="javascript" src="js/jquery.easing.1.3.js"></script>
<script type="text/javascript" language="javascript" src="js/jquery.animate-colors-min.js"></script>
<script type="text/javascript" language="javascript" src="js/jquery.skitter.min.js"></script>
<!-- Init Skitter -->
<script type="text/javascript" language="javascript">
$(document).ready(function() {
$('.box_skitter_large').skitter({
theme: 'clean',
numbers_align: 'center',
progressbar: true, 
dots: true, 
preview: true
});
});
</script>


this is drop down menu

<script src="http://code.jquery.com/jquery-1.9.0.js" type="text/javascript"></script>
    <script src="js/jquery.flexnav.min.js" type="text/javascript"></script>
    <script type="text/javascript">$(".flexnav").flexNav();</script>