var site = self.location.href;
var type = ".html";

var nav = parseInt(site.substring(site.indexOf("main/")+5,site.indexOf("main/")+6));
var snav = parseInt(site.substring(site.indexOf("main/")+7,site.indexOf("main/")+8));
var page = parseInt(site.substring(site.indexOf("main/")+9,site.length-5));

var zpage = page - 1;
var wpage = page + 1;

var zurueck = snav + "_" + zpage + type;
var weiter = snav + "_" + wpage + type;

var zimg = "<img src=\"../images/back.gif\" width=\"20\" height=\"20\" border=\"0\" vspace=\"12\">";
var spacer = "<img src=\"../images/pl_tr.gif\" width=\"5\" height=\"1\" >";
var wimg = "<img src=\"../images/vor.gif\" width=\"20\" height=\"20\" border=\"0\" vspace=\"12\">";

function pagenav(par) {
  document.write('<table width="800" border="0" cellspacing="0" cellpadding="0">\n');
  document.write('<tr valign="bottom">\n');
  document.write('<td width="740">&nbsp;</td>\n');
  document.write('<td width="45" align="right">');
  switch(par) {
    case 0:
      if(zpage>=0) {
        document.write('<a href="' + zurueck + '" onFocus="if(this.blur)this.blur()">'+zimg+'</a>');
      } else {
        document.write("&nbsp;");
      }
    break;
    case 1:
      if(zpage>=0) {
        document.write('<a href="' + zurueck + '" onFocus="if(this.blur)this.blur()">'+zimg+'</a>'+spacer+'<a href="' + weiter + '" onFocus="if(this.blur)this.blur()">'+wimg+'</a>');
      } else {
        document.write('<a href="' + weiter + '" onFocus="if(this.blur)this.blur()">'+wimg+'</a>');
      }
    break;
  }
  document.write('</td>\n');
  document.write('<td><img src="../images/pl_tr.gif" width="15" height="1" border="0"></td></tr>\n');
  document.write('</table>');
}