window.onload = function() {
	/* read cookies to determine default style sheet */
	var cookie = readCookie("FontSize");
	var title = cookie ? cookie : "FontSize_2"; // set default if cookie not present
	setActiveStyleSheet("FontSize",title);
	cookie = readCookie("Contrast");
	title = cookie ? cookie : "Contrast_1"; // set default if cookie not present
	setActiveStyleSheet("Contrast",title);
}

window.onunload = function() {
	/* set cookies so user gets same stylesheet when they return */
	var title = getActiveStyleSheet("FontSize");
	createCookie("FontSize", title, 365);
	title = getActiveStyleSheet("Contrast");
	createCookie("Contrast", title, 365);	
}