// retrieve cookie.
function getCookie(name){
	alert (document.cookie);
  var cname = name + "=";
  var dc = document.cookie;
  if (dc.length > 0) {
    begin = dc.indexOf(cname);
    if (begin != -1) {
      begin += cname.length;
      end = dc.indexOf(";", begin);
      if (end == -1) end = dc.length;
        return unescape(dc.substring(begin, end));
    }
  }
  return null;
}

// set cookie.
function setCookie(name, value, path, expires, domain, secure) {
  document.cookie = name + "=" + escape(value) +
  ((expires == null) ? "" : "; expires=" + expires.toGMTString()) +
  ((path == null) ? "" : "; path=" + path) +
  ((domain == null) ? "" : "; domain=" + domain) +
  ((secure == null) ? "" : "; secure");
}

// delete cookie.
function delCookie (name,path,domain) {
  if (getCookie(name)) {
    document.cookie = name + "=" +
    ((path == null) ? "" : "; path=" + path) +
    ((domain == null) ? "" : "; domain=" + domain) +
    "; expires=Thu, 01-Jan-70 00:00:01 GMT";
  }
}

var firstCall = true;

function changeFontsize(fSize, increment) {
  if (firstCall) {
    firstCall = false;
    if (increment != "")
      changeFontsize('12', '');
  }
  if (document.getElementsByTagName) {
    tags = new Array ( "div", "p", "a", "font", "span", "li", "strong" );
    for (j=0; j<tags .length; j++) {
      var getElement = document.getElementsByTagName(tags[j]);
      var eachElement, currentFontSize, fontIncrease, newFontSize;
      for (i=0; i<getElement.length; i++) {
		  eachElement = getElement[i];
		if (eachElement.id == "menu_item")
		{
			// do not change the font size
		}
		else
		{
			if (increment != "") {
			  currentFontSize = parseInt(eachElement.style.fontSize);
			  fontIncrease = parseInt(increment);
			  newFontSize = currentFontSize + fontIncrease;
			  }
			else if (fSize != "")
			  newFontSize = parseInt(fSize);
			if (tags[j] == "li")
			  eachElement.style.lineHeight = Math.round(newFontSize*1.2) + "px";
			else
			  eachElement.style.lineHeight = Math.round(newFontSize*1.5) + "px";
			if (fSize != "") {
			  switch(tags[j]) {
			  case "h2": newFontSize += 0; break;
			  case "h3": newFontSize += 0; break;
			  case "h4": newFontSize += 0; break;
			  case "h5": newFontSize += 0; break;
			  case "h6": newFontSize += 0;
			  }
			}
			eachElement.style.fontSize = newFontSize + "px";
			setCookie('fontSize', newFontSize, '/');
		}
      }
    }
  }
}