window.onload = function() 
{
  var fontsize = readCookie('fontsize');
  if (null!=fontsize && 12!=fontsize) { 
    changeFontSize(fontsize); 
  }else{
    writeFontSizeLinks('fontsize');
  }
}

function writeFontSizeLinks(div) {
  var act = "";
  var html = "";
  if (null==readCookie('fontsize')) { createCookie('fontsize', 12, 1) }
  for (var s=12; s<=16; s+=2) {
    if (s==readCookie('fontsize')) {
      html +='<a href="javascript:return;" style="font-size:'+s+'px" class="act">a</a>';
    }else{
      html +='<a href="javascript:return;" style="font-size:'+s+'px" onclick="changeFontSize(\''+s+'\')" >a</a>';
    }
  }
  $(div).innerHTML = html;
}

function changeFontSize(size) 
{
  var tags = Array('p', 'div.text', 'h4');
  var els;
  for (var i=0; i<tags.length; i++) {
    els = document.getElementsBySelector(tags[i]);
    changeFontSizeIn(els, size);
  }
  createCookie('fontsize', size, 1);
  writeFontSizeLinks('fontsize');
}

function changeFontSizeIn(p, inc)
{
  for(var n=0; n<p.length; n++) {
    /*if(p[n].style.fontSize) {
       var size = parseInt(p[n].style.fontSize.replace("px", ""));
    } else {
       var size = 12;
    }*/
    p[n].style.fontSize = inc+'px';//(size+inc)+'px';
   }
}

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 var 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 eraseCookie(name) {
	createCookie(name,"",-1);
}

function $() {
  var elements = new Array();

  for (var i = 0; i < arguments.length; i++) {
    var element = arguments[i];
    if (typeof element == 'string')
      element = document.getElementById(element);

    if (arguments.length == 1) 
      return element;

    elements.push(element);
  }

  return elements;
}

function show(el) {
  $(el).style.display = '';
}

function toggleComments() {
  Element.toggle('comment-form');
  Element.toggle('comment-on');
  Element.toggle('comment-off');
}