var gimpressum_Fenster_1 = "";

function div_wechsel (ein, aus) {

document.getElementById(aus).style.visibility = 'hidden';

document.getElementById(ein).style.visibility = 'visible';

}

function impressum(datei_name) {

gimpressum_Fenster_1 = window.open(datei_name, "Impressum", "width=500, height=500, scrollbars=yes");
gimpressum_Fenster_1.focus();


}