function getRackUID() {
	var found = readCookie('rackuid');
	if( found == null) {
		found = createRackUID();
		createCookie('rackuid', found, 30);
	}
	return found;
}

function createRackUID() {
	var text = "AU";
	var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
	for (i=0; i<32; i++) {
		text += possible.charAt(Math.floor(Math.random() * possible.length));
	}
	return text;
}

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);
}