jQuery(document).ready( function(){
	var currentSize = readCookie( "fontSize" );

	if ( currentSize ) {
		switchFont( currentSize );
	} else {
		switchFont( "medium" );
	}

	jQuery(".fontChanger p img").click( function() {
		switchFont(this.getAttribute("id"));	
	});
});


function switchImage( ID ) {

	jQuery(".fontChanger p img").each( function () {
		this.src = this.src.replace(/^(.+)_on(\.[a-z]+)$/, "$1$2");
	});

	jQuery("#" + ID ).each( function() {
		this.src = this.src.replace(/^(.+)(\.[a-z]+)$/, "$1_on$2");
	});

}

function switchFont(className){
	switchImage( className );
	jQuery("body").removeClass("large").removeClass("medium").removeClass("small").addClass(className);
	createCookie('fontSize', className, 365);
};

// cookie script http://www.quirksmode.org/js/cookies.html
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 var 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;
}