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function wai_aria() {
 if (document.getElementById('content')) document.getElementById('content').setAttribute('role', 'main');
 if (document.getElementById('navi_oben')) document.getElementById('navi_oben').setAttribute('role', 'navigation');
 if (document.getElementById('navi_seite')) document.getElementById('navi_seite').setAttribute('role', 'navigation');
 if (document.getElementById('suche')) document.getElementById('suche').setAttribute('role', 'search');
 }
 window.onload = function() {
  Highlight(); wai_aria();
}