$(document).ready(function() {
    $('.speakerDescription').hide();
    $('a.collapsible').toggle(function() {
        var id = $(this).attr('id');
        id = id.substr(28); 
        $('#ctl00_cphMain_pDescription' + id + ' > .speakerDescription').slideDown("fast");
        $('#ctl00_cphMain_lnkCollapsible' + id + ' > img').attr('src','media/Images/Button_Hide.gif');
        $('#ctl00_cphMain_lblCollapsible' + id).text('Hide bio');
         return false;
        }, function() {    
        var id = $(this).attr('id');
        id = id.substr(28); 
        $('#ctl00_cphMain_pDescription' + id + ' > .speakerDescription').slideUp("fast");
        $('#ctl00_cphMain_lnkCollapsible' + id + ' > img').attr('src','media/Images/Button_Show.gif');
        $('#ctl00_cphMain_lblCollapsible' + id).text('Read bio');
    });
});