var prefsLoaded = false;
var fontSizeClasses = new Array("textSizing_3","textSizing_2","textSizing_1","textSizing0","textSizing1","textSizing2","textSizing3");
var defaultFontSizeLevel = 3;
var currentFontSizeLevel = defaultFontSizeLevel; 

function revertStyles(){
	currentFontSizeLevel = defaultFontSizeLevel;
	changeFontSize("reset");
}


function changeFontSize(changeAction){
	//alert ("Antes"+currentFontSize);
	//currentFontSize = currentFontSize + (sizeDifference / 10);
	switch(changeAction){
		case "up":
			currentFontSizeLevel++;
			break;
		case "down":
			currentFontSizeLevel--;
			break;
		case "reset":
			currentFontSizeLevel = defaultFontSizeLevel;
			break;
	}
	//alert ("Despues"+currentFontSize);
	if(currentFontSizeLevel > fontSizeClasses.length-1){
		currentFontSizeLevel = fontSizeClasses.length-1;
		return false;
	}else if(currentFontSizeLevel < 0){
		currentFontSizeLevel = 0;
		return false;
	}
	setFontSize(currentFontSizeLevel);
};

function setFontSize(fontSize){

	document.getElementById("realContent").className=fontSizeClasses[currentFontSizeLevel]
	/*var stObj = (document.getElementById) ? document.getElementById('content_area') : document.all('content_area');
	document.body.style.fontSize = fontSize + 'em'; */
};

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 setUserOptions(){
	if(!prefsLoaded){
		cookie = readCookie("fontSize");
		currentFontSizeLevel = cookie ? cookie : defaultFontSizeLevel;
	//	alert ("Cookie"+currentFontSize);
		currentFontSizeLevel = parseInt(currentFontSizeLevel);
		setFontSize(currentFontSizeLevel);
		prefsLoaded = true;
		setLinkEvents();
	}

}

window.onunload = saveSettings;

function saveSettings()
{
	//	alert ("saveSettings"+currentFontSize);
		createCookie("fontSize", currentFontSizeLevel, 365);
}

function setLinkEvents(){
	if($("#realContent")){
		$("a.smallerFont").keypress(function(e){changeFontSize("down");});
		$("a.smallerFont").click(function(e){changeFontSize("down");});
		
		$("a.defaultFont").keypress(function(e){changeFontSize("reset");});
		$("a.defaultFont").click(function(e){changeFontSize("reset");});
			
		$("a.biggerFont").keypress(function(e){	changeFontSize("up");});
		$("a.biggerFont").click(function(e){changeFontSize("up");});	
	}
}