// Se supone que hay almenos un token
Token token0 = cssTextCode.getToken(0);
if (!(token0 instanceof FloatNumber))
return false;
FloatNumber tokenNumber = (FloatNumber)token0;
float floatValue = tokenNumber.getFloat();
short unitType = -1;
if (cssTextCode.tokenCount() > 2)
throw new DOMException(DOMException.INVALID_ACCESS_ERR,"CSS: number format error: " + cssTextCode.toString());