[Help Wordpress] Post slider and dynamic sidebar

I decided to include some js to frequently check for hashchanges in the url and add or delete a list of links in the sidebar. When testing it locally in simple html it works fine. Uploaded to the server (http://lrvkoeln.de/Tests/LRV/) nothing happens.

Can you please give me a hint why?

This is the js-file I included in the head of my header.php:

var hash = false; 
checkHash();

function checkHash(){ 
    if(window.location.hash != hash) { 
        hash = window.location.hash; 
        processHash(hash); 
    } t=setTimeout("checkHash()",400); 
}

function processHash(hash){

    if (window.location.hash == "#page-1") {
    $("#textwidget ul").empty();
    }
    if (window.location.hash == "#page-2") {
    $('#textwidget ul').html('
Geschichte
Vorstand
Anlage
Mitglied werden
');
    }
    if (window.location.hash == "#page-3") {
    $("#textwidget ul").empty();
    }
    if (window.location.hash == "#page-4") {
    $("#textwidget ul").html('
Musi Center
Manga Center
');
    }
    if (window.location.hash == "#page-5") {
    $("#textwidget ul").html('
Multivitamin Center
Mutti Center
');
    }
    if (window.location.hash == "#page-6") {
    $("#textwidget ul").empty();
    }
    if (window.location.hash == "#page-7") {
    $("#textwidget ul").empty();
    }
    if (window.location.hash == "#page-8") {
    $("#textwidget ul").empty();
    }
}

.

help.dimsemenov.com