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function GUID(_val:Array):String {
	var uid:Array = new Array();
	var chars:Array = new Array(48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 65, 66, 67, 68, 69, 70);
	var separator:Number = 45;
	var template:Array = _val || new Array(8, 4, 4, 4, 12);
	for (var a:Number = 0; a < template.length; a++) {
		for (var b:Number = 0; b < template[a]; b++) {
			uid.push(chars[Math.floor(Math.random() * chars.length)]);
		}
		if (a < template.length - 1) {
			uid.push(separator);
		}
	}
	return String.fromCharCode.apply(null, uid);
}

trace(GUID());