I have a page that the client want users to be able to change from english to spanish and vice versa.  The fade out and fade in functions are working fine but the content is the same as prior to the click .  I am not sure why.  I have tested the php page and it works fine.  The link to this page in question is oncall.  Only one of the bio's has this option.  Does .load require an additional plugin?  Can someone tell me what I am doing wrong?

$("#englishBtn").click(function() {
    $("#bioTop").fadeOut("slow");
    $("#bioTop").load("backend.php", { bioTop : this.value });
    $("#bioTop").fadeIn("slow");
    });

Thank you ahead.