jquery与Discuz代码冲突的解决方法

<script typet="text/javascript" src="http://www.aizhanku.com/jquery/1.9.1/jquery.min.js"></script>
<script type='text/javascript' >
    $(window).bind("scroll",
        function() {
        var st = $(document).scrollTop();
        var sel=$("#J_m_nav,top");
        if (st > 600) {
            sel.addClass("nav_fixed");
        } else {
            sel.removeClass("nav_fixed");
        }
    });
</script>

<script typet="text/javascript" src="template/xiaoguotuzhijia/js/picLoad/jquery-1.9.1.min.js"></script>
<script type='text/javascript' >
var jq = jQuery.noConflict();
    jq(window).bind("scroll",
        function() {
        var st = jq(document).scrollTop();
        var sel=jq(".hdc");
        if (st > 580) {
            sel.addClass("nav_fixed");
        } else {
            sel.removeClass("nav_fixed");
        }
    });
</script>