var offen="";
var pican="";

function testen()
{
if ((navigator.appName=="Microsoft Internet Explorer")&&(navigator.appVersion.charAt(0)>=4))
{schicht="document.all";auf="[";zu="]";stil=".style";}
else if
((navigator.appName=="Netscape")&&(navigator.appVersion.charAt(0)>=4)&&(navigator.appVersion.substring(0,1)<5))
{schicht="document.layers";auf="[";zu="]";stil="";}
else if
((navigator.appName=="Netscape")&&(navigator.appVersion.charAt(0)>=5))
{schicht="document.getElementById";auf="(";zu=")";stil=".style";}
else
window.location.href="head_30.htm";
}

function zeig(wen)
{if (offen)
{eval(schicht+auf+'offen'+zu+stil+'.visibility="hidden"');}
if (wen)
{eval(schicht+auf+'wen'+zu+stil+'.visibility="visible"');
offen=wen;}}

function an(pic)
{if (pican)
{eval(schicht+auf+'pican'+zu+stil+'.visibility="hidden"');}
if (pic)
{eval(schicht+auf+'pic'+zu+stil+'.visibility="visible"');
pican=pic;}}

function show(li)
{if (li)
{eval(schicht+auf+'li'+zu+stil+'.visibility="visible"');}}

function verst(li)
{
if (li)
{
eval(schicht+auf+'li'+zu+stil+'.visibility="hidden"');
}
}