i'm using facebox to open a remote page,
i includedjQuery, facebox.js and facebox.css
and put it in document.ready like this 
jQuery(document).ready(function ($) {
$('a[rel*=facebox]').facebox({
    loadingImage: 'imgs/loading.gif',
    closeImage: 'imgs/closelabel.png'
   });
});
everything works till i call this function
function lecFunc(year)
{
        var name = year + '_lec';
        $.post('php/scripts/lecClickScript.php', { matYear: year, matType: name      }, function (data) {
            document.getElementById("lecs_tbody").innerHTML = data;
            document.getElementById("lecs_boxbody").style.display = 'block';
            document.getElementById("qus_boxbody").style.display = 'none';
        });
    }
the facebox doesn't work any more
EDIT :: Solved
Actully the problem was that i was using two jQuery versions
then i read this qustion Can-i-use-multiple-versions-of-jquery-on-the-same-page
then added this code by the exact sequence
    <script src="js/jQuery.js"></script>
    <script type="text/javascript" src="js/facebox.js" ></script>
    <script type="text/javascript" src="js/onClick.js" ></script>
    <script>var $j = jQuery.noConflict(true);</script>
    <script src="plugins/jQuery/jQuery-2.1.3.min.js"></script>
    <script>
        $(document).ready(function () {
            console.log($().jquery); // This prints v2.1.3
            console.log($j().jquery); // This prints v1.4.2
        });
   </script>
and in onClick.js file
jQuery(document).ready(function ($) {
    $('a[rel*=facebox]').facebox({
        loadingImage: 'imgs/loading.gif',
        closeImage: 'imgs/closelabel.png'
    });
});
function lecFunc(year) {
    var name = year + '_lec';
    $.post('php/scripts/lecClickScript.php', { matYear: year, matType: name }, function (data) {
        document.getElementById("lecs_tbody").innerHTML = data;
        document.getElementById("lecs_boxbody").style.display = 'block';
        document.getElementById("qus_boxbody").style.display = 'none';
        $j('a[rel*=facebox]').facebox({
            loadingImage: 'imgs/loading.gif',
            closeImage: 'imgs/closelabel.png'
        });
    });
}