switch (ebene) {
  case 0:
    i_path="";
    break;
  case 1:
    i_path="../";
    break;
  case 2:
    i_path="../../";
    break;
  case 3:
    i_path="../../../";
    break;
}
//Browser erkennen
txt = "<p>Browser CodeName: " + navigator.appCodeName + "</p>";
txt+= "<p>Browser Name: " + navigator.appName + "</p>";
txt+= "<p>Browser Version: " + navigator.appVersion + "</p>";
txt+= "<p>Cookies Enabled: " + navigator.cookieEnabled + "</p>";
txt+= "<p>Platform: " + navigator.platform + "</p>";
txt+= "<p>User-agent header: " + navigator.userAgent + "</p>";
if(txt.indexOf("Opera")>0){actBrowser="Opera";}
if(txt.indexOf("Microsoft")>0){ actBrowser="Internetexplorer";}
if(txt.indexOf("Netscape")>0){ actBrowser="Firefox";}
if(txt.indexOf("Safari")>0){ actBrowser="Safari";}
//Browser erkennen ende
if(actBrowser == "Microsoft Internet Explorer"){
  sWidth = screen.availWidth;
  header=''
  header=header + '  <tr class="header">';
  header=header + '    <td colspan=3 align="center" valign="top" style="height:80px;padding-bottom:20px;">';
  header=header + '    <img src="' + i_path + 'images/headerOrtenau.jpg" style="width:' + sWidth + ';">';
  header=header + '    </td>';
  header=header + '  </tr>';
}else{
  if(actBrowser="Safari"){
    sWidth = screen.availWidth+8;
    header=''
    header=header + '  <tr class="header">';
    header=header + '    <td colspan=3 align="center" valign="top" style="height:80px;padding-bottom:20px;">';
    header=header + '    <img src="' + i_path + 'images/headerOrtenau.jpg" style="width:' + sWidth + ';">';
    header=header + '    </td>';
    header=header + '  </tr>';
  }else{
    sWidth = screen.availWidth-2;
    header=''
    header=header + '  <tr class="header">';
    header=header + '    <td colspan=3 align="center" valign="top" style="height:80px;padding-bottom:20px;">';
    header=header + '    <img src="' + i_path + 'images/headerOrtenau.jpg" style="width:' + sWidth + ';">';
    header=header + '    </td>';
    header=header + '  </tr>';
  }
}
document.write(header);
//alert(document.getElementById("main").offsetWidth);