var default_fontsize = "0.9";
var unit = 'em';

function init_font()
{
  content = document.getElementById('l_content');
  if(document.cookie)
  {
    var cookie_data = document.cookie.split("=")[1];

    if(cookie_data.match(/em/))
    {
      content.style.fontSize = cookie_data;
    }
    else
    {
      content.style.fontSize = "0.9em";
    }
  }
  else
  {
    content.style.fontSize = "0.9em";
  }
}

function increase_fontsize()
{
  var prev_fontsize = parseFloat(content.style.fontSize);
  if(prev_fontsize < 1.5)
  {
    new_fontsize = prev_fontsize+0.1;
    new_fontsize = new_fontsize+"em";
    content.style.fontSize = new_fontsize;
    var expire = new Date();
    expire = new Date(expire.getTime()+1000*60*60*24*365);
    document.cookie = "font_size="+new_fontsize+"; expires="+expire.toGMTString()+';';
    
  }
  
}

function decrease_fontsize()
{
  var prev_fontsize = parseFloat(content.style.fontSize);
  if(prev_fontsize > 1.0)
  {
    new_fontsize = prev_fontsize-0.1;
    new_fontsize = new_fontsize+"em";
    content.style.fontSize = new_fontsize;
    var expire = new Date();
    expire = new Date(expire.getTime()+1000*60*60*24*365);
    document.cookie = "font_size="+new_fontsize+"; expires="+expire.toGMTString()+';';
    
  }
  
}

function reset_fontsize()
{
  new_fontsize = "0.9em";
  content.style.fontSize = new_fontsize;
  var expire = new Date();
  expire = new Date(expire.getTime()+1000*60*60*24*365);
  document.cookie = "font_size="+new_fontsize+"; expires="+expire.toGMTString()+';';
}

function pic_cycle()
{
	var a = Math.floor(1+(4-1+1)*(Math.random()));
	document.getElementById('js_cycle').src='./img/cycle_'+a+'.jpg';
		

}