praxis_lo = new Image();

    praxis_lo.src = "../bilder/d_praxis_page.gif";

    praxis_hi = new Image();

    praxis_hi.src = "../bilder/d_praxis_page_li.gif";

    vorsorge_lo = new Image();

    vorsorge_lo.src = "../bilder/vorsorge_page.gif";

    vorsorge_hi = new Image();

    vorsorge_hi.src = "../bilder/vorsorge_page_li.gif";

    diag_lo = new Image();

    diag_lo.src = "../bilder/diag_page.gif";

    diag_hi = new Image();

    diag_hi.src = "../bilder/diag_page_li.gif";

    spektrum_lo = new Image();

    spektrum_lo.src = "../bilder/spektrum_page.gif";

    spektrum_hi = new Image();

    spektrum_hi.src = "../bilder/spektrum_page_li.gif";

    

    function change(welches, wie)  {

      welches.src = wie.src;  }  



    function openText(url) {

    var xx=open(url, "text", "scrollbars=yes,resizable=yes,width=480,height=500");

    xx.focus();

    }