// the basics
try {
document.execCommand('BackgroundImageCache', false, true);
}
catch(e) {}

$(document).ready(function(){

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

	$('a.large_type').click(function(){
		setActiveStyleSheet('large');
		return false;
	});
	$('a.medium_type').click(function(){
		setActiveStyleSheet('medium');
		return false;
	});
	$('a.small_type').click(function(){
		setActiveStyleSheet('small');
		return false;
	});

});



function setActiveStyleSheet(title) {
	if (title == 'large'){
		$("#content").css('font-size', '1.5em');
	}
	if (title == 'medium'){
		$("#content").css('font-size', '1em');
	}
	if (title == 'small'){
		$("#content").css('font-size', '0.8em');
	}
	createCookie("embiggen", 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("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=/; domain=leveragingdifference.com;";
}

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;
}