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;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}

jQuery.fn.fontsizemanager = function () {
	
	var startFontSize = parseFloat("16px");
	jQuery('.fontsizemanager_add').css("cursor","pointer");
	jQuery('.fontsizemanager_minus').css("cursor","pointer");
	jQuery('.fontsizemanager_reset').css("cursor","pointer");
	jQuery('.fontsizemanager_add').click(function() {
		var newFontSize = parseFloat(jQuery("body").css("font-size"))
		newFontSize=newFontSize*1.2;
		jQuery('body').css("font-size",newFontSize);
		createCookie("font_size",newFontSize);
	});
	jQuery('.fontsizemanager_minus').click(function() {
		var newFontSize = parseFloat(jQuery("body").css("font-size"))
		newFontSize=newFontSize*0.8;
		jQuery('body').css("font-size",newFontSize);
		createCookie("font_size",newFontSize);		 
	});
	jQuery('.fontsizemanager_reset').click(function() {
		jQuery('body').css("font-size",startFontSize);
		//createCookie("font_size",newFontSize);			 
		eraseCookie("font_size");
	});
}