AutoConvert type Number with Number() not parseFloat()

parseFloat(’17:25.9’) === 17
Number(’17:25.9’) === NaN
parseFloat(’1typo7’) === 1
Number(’1typo7’) === NaN

I believe receiving a ‘must be a number’ error message when entering ‘1typo7’ makes more sense than autoConverting it to 1.

http://stackoverflow.com/questions/12227594/which-is-better-numberx-or-parsefloatx