function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) {
    	return a.getAttribute("title");
    }
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  if(!title) title="Size 1";
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
if(!title) title="Size 1";
setActiveStyleSheet(title);

function setCharSizeKleiner() {
 	var title = getActiveStyleSheet();
	if(!title) title="Size 1";
	var charSize = title.split(" ");
	newsize = parseInt(charSize[1])-1;
	if (newsize > 0) setActiveStyleSheet('Size '+ newsize);		
	var title = 'Size '+ newsize;
}

function setCharSizeGroesser() {
	var title = getActiveStyleSheet();
	if(!title) title="Size 1";
	var charSize = title.split(" ");
	newsize = parseInt(charSize[1])+1;
	if (newsize <= 7) setActiveStyleSheet('Size '+ newsize);	
	var title = 'Size '+ newsize;
}

function writeFontMenue() {
	document.write('<div class="divschrift">');
	document.write('<a href="javascript:;" onclick="setCharSizeKleiner(); return false;"><img src="/chemnitz/daten/icons/schrift_minus1.gif" alt="Schriftanzeige verkleinern" name="minus" width="16" height="16" hspace="0" vspace="0" border="0" id="minus" title="Schriftanzeige verkleinern" onmouseover="MM_swapImage(\'minus\',\'\',\'/chemnitz/daten/icons/schrift_minus2.gif\',1)" onmouseout="MM_swapImgRestore()" /></a>');
	document.write('<img src="/chemnitz/daten/icons/schrift.gif" alt="" width="18" height="16" hspace="0" vspace="0" border="0" />');
	document.write('<a href="javascript:;" onclick="setCharSizeGroesser(); return false;"><img src="/chemnitz/daten/icons/schrift_plus1.gif" alt="Schriftanzeige vergrößern" name="plus" width="16" height="16" hspace="0" vspace="0" border="0" id="plus" title="Schriftanzeige vergrößern" onmouseover="MM_swapImage(\'plus\',\'\',\'/chemnitz/daten/icons/schrift_plus2.gif\',1)" onmouseout="MM_swapImgRestore()" /></a>');
	document.write('</div>');	
}