Hex Validation

public class HexUtils {
	public static const HEX_64_BITS:int = 10;
	public static const HEX_128_BITS:int = 26;
 
	public static function isValidHex(_val:String, ...args:Array):Boolean {
		//splice the 0x if it's there
		if(_val.substr(0, 2)=="0x") _val = _val.substr(2);
 
		//this part is not tested
		var length:Array = [HEX_64_BITS, HEX_128_BITS];
		if(args.length>0) {
			if(args[0] is Array) {
				length = args[0];
			} else {
				length = [args[0]];
			}
		}
 
		//test with hex char
		if(length.indexOf(_val.length)>-1) {
			if(_val.match(/^[A-Fa-f0-9]*$/)) {
				return true;
			}
		}
 
		return false;
	}
}
 
TESTING:
 
var hexToTest:Array = ['0x1122334455', '1122334455', '0x112233445', '0xabcde12345', '0xz123456789', '0xabcdeaaaaa'];
for each(var hex:String in hexToTest) {
	trace('isHexValid', hex, HexUtils.isValidHex(hex));
}