var textSizes= new Array(1.0, 1.25, 1.5);

function setCookie(name,value) 
{
	var days = 15;
	var date = new Date();
	date.setTime(date.getTime()+(days*24*60*60*1000));
	var expires = "; expires="+date.toGMTString();

	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) 
{
	if(document.cookie!=null)
	{
		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 0;
}

function setFontSize(newSize)
{
	if(newSize==null)
	{
		return;
	}
	if(isNaN(newSize))
	{
		return;
	}
	if(newSize<0)
	{
		return;
	}
	if(newSize>2)
	{
		return;
	}

	document.getElementById("contentwrapper").style.fontSize=textSizes[newSize]+"em";
	setCookie('textSize',newSize);
}

function textSizePref()
{
	var textSizePref = readCookie('textSize');
	setFontSize(textSizePref);
}