// (c)2006 All rights reserved.

function setupFontSize()
{
	var fontSize = getCookie("swallowLifts");
	if ( fontSize == "larger" )
	{
		makeFontSizeLarger();
	}
	else
	{
		setDefaultFontSize();
	}
}

function getCookie(c_name)
{
	if (document.cookie.length>0)
	{
		c_start=document.cookie.indexOf(c_name + "=")
		if (c_start!=-1)
		{
			c_start=c_start + c_name.length+1;
			c_end=document.cookie.indexOf(";",c_start);
			if (c_end==-1)
				c_end=document.cookie.length;
			return unescape(document.cookie.substring(c_start,c_end));
		}
	}
	return "";
}

function setCookie(c_name,value,expiredays)
{
	var exdate=new Date();
	exdate.setDate(exdate.getDate()+expiredays);
	document.cookie=c_name+ "=" +escape(value)+((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
}

function setDefaultFontSize()
{
	// update font size
	(document.getElementById("largerFontStyle")).disabled=true;
	
	// record preference in cookie
	setCookie("swallowLifts","default",1);
	
	// change text on menu
	var menu = document.getElementById("headerTop");
	var anchor = menu.getElementsByTagName("a");
	anchor[0].href = "javascript:makeFontSizeLarger();";
	anchor[0].innerHTML = "Click here for larger text";
}

function makeFontSizeLarger()
{
	// update font size
	(document.getElementById("largerFontStyle")).disabled=false;
	
	// record preference in cookie
	setCookie("swallowLifts","larger",1);
	
	// change text on menu
	var menu = document.getElementById("headerTop");
	var anchor = menu.getElementsByTagName("a");
	anchor[0].href = "javascript:setDefaultFontSize();";
	anchor[0].innerHTML = "Default font size";

	// <a href="javascript:setDefaultFontSize();">Default font size</a>
}