var agt=navigator.userAgent.toLowerCase();
var is_ie = (agt.indexOf("msie") != -1);
var is_nn = (agt.indexOf("netscape") != -1);
var is_op = (agt.indexOf("opera") != -1);
var is_ff = (agt.indexOf("firefox") != -1);
if(is_op) {
is_ie = false;
is_nn = false;
is_ff = false;
}

function showhide(id,check,descid) {
 check = !check;
 if (isArray(id)) for(i in id)
  document.getElementById(id[i]).style.display = check ? "" : "none";
 else document.getElementById(id).style.display = check ? "" : "none";
 if (descid) {
  if (isArray(descid)) for(i in descid)
   document.getElementById(descid[i]).style.display = check ? "none" : "";
  else document.getElementById(descid).style.display = check ? "none" : "";
 }
}

function member(number)
{
open("http://www.bierschinken.net/members/membersstyle.php?"+number+"&style=small","_blank","width=400,height=360,scrollbars=yes");
}

function isArray(obj) {
   if (obj.constructor.toString().indexOf("Array") == -1)
      return false;
   else
      return true;
}