add parseInt,parseFloat,isNaN

Ignore-this: 4bd0af6bd45abe146296f49bc4300c37

darcs-hash:20130105180929-0aaf7-45ab6cb965b2b54abbce14867adc86d130815ba6
Dom.element.onscroll

Ignore-this: 798ce90ee75c07e28ee82d615e44a0b8

darcs-hash:20130105185319-a1a2a-ef9874ed8366b7ca0d8f0e3065cff5602cc63ecd