/* 1. fontswitch
--------------------------------------------------------------------------	*/

if (document.images) {
	var s_off = new Image(); s_off.src = '/common/images/font_small_off.gif';
	var s_on  = new Image(); s_on.src  = '/common/images/font_small_on.gif';
	var m_off = new Image(); m_off.src = '/common/images/font_middle_off.gif';
	var m_on  = new Image(); m_on.src  = '/common/images/font_middle_on.gif';
	var b_off = new Image(); b_off.src = '/common/images/font_big_off.gif';
	var b_on  = new Image(); b_on.src  = '/common/images/font_big_on.gif';
}

function setActiveStyleSheet(title) {
    var i, a, main;
	if(title == "f_s"){
		document.images["s_img"].src = s_on.src;
		document.images["m_img"].src = m_off.src;
		document.images["b_img"].src = b_off.src;
	}else if(title == "f_b"){
		document.images["s_img"].src = s_off.src;
		document.images["m_img"].src = m_off.src;
		document.images["b_img"].src = b_on.src;
	}else{
		// f_type == "default"
		document.images["s_img"].src = s_off.src;
		document.images["m_img"].src = m_on.src;
		document.images["b_img"].src = b_off.src;
	
	}
	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;
    }
  }
  createCookie("style", title, 365);
}

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;
}

function getSwitch() {
  var cookie = readCookie("style");
  if(!cookie){
	cookie =  "default";
  }
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}