var collapse_symbol = '<img src="/resources/forums/Collapse16.gif" width="16" height="16" ALT="-" border="0">';
var expand_symbol = '<img src="/resources/forums/Expand16.gif" width="16" height="16" ALT="+" border="0">';
var replies = new Array();

// toggle visibility

function getid(id) {
       if(document.getElementById)
		return document.getElementById(id);
       else if(document.all)
		return document.all(id);
	return false;
}

function toggle( targetId, state ){
        var symbol;
  		var content = getid( 'content'+targetId );
  		var link = getid( 'toggle'+targetId );
        if(!link || !content) return;

        var s;
    	if(state != null)
	    	s = state;
        else if (content.className == "dynexpanded")
            s = 0;
        else
            s = 1;
        
        if (s) {
            content.className = "dynexpanded";
            symbol = collapse_symbol;
        } else {
            content.className = "dyncollapsed";
            symbol = expand_symbol;
        }

        if(link.innerHTML)
            link.innerHTML = symbol;
        else if(link.appendChild) {
            while(link.hasChildNodes())
                link.removeChild(link.firstChild);
            link.appendChild(document.createTextNode(symbol));
	    }
}

function toggleList(a,state) {
	if(!a.length) return;
	for(var i = 0; i < a.length; ++i) {
        toggle(a[i], state);
	}
}

// switch styles

function setActiveStyleSheet(title) {
  var i, a, main;
  for (i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if (a.getAttribute("rel") &&
        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") &&
        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") &&
        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();
  setActiveStyleSheet(title);
}

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

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);