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	// *******************************************************
	// Cookie helper functions
	// *******************************************************

	// get cookie
	function getCookie(cookie_name){
		var regex = new RegExp('(^|;\\s)'+cookie_name+'=([^;]+)', 'i');
		return (document.cookie.match(regex) || [])[2];
	}

	// set cookie for 30 days
	function setCookie(name, value){
		var exp = new Date(Date.parse(new Date()) + (30*24*60*60*1000));
		var domain = window.location.hostname.replace(/www/i,''); // domain isolation is tricky, so this will cover the majority of use cases
		document.cookie = name+'='+value+'; path=/; expires='+exp+'; domain='+domain;
	}

	// delete cookie
	function deleteCookie(name) {
		var domain = window.location.hostname.replace(/www/i,'');
		document.cookie = name+'=; domain='+domain+'; path=/; expires=Thu, 01 Jan 1970 00:00:01 GMT;';
	}