Date.parse

ie10

new Date(Date.parse("2013-07-30"))
Tue Jul 30 08:00:00 UTC+0800 2013

new Date(Date.parse("2013-07-30 00:00:00")) 
Invalid Date 

ie 7

new Date(Date.parse("2013-07-30"))
NaN 

new Date(Date.parse("2013-07-30 00:00:00")) 
NaN 

chrome

new Date(Date.parse("2013-07-30"))
Tue Jul 30 2013 08:00:00 GMT+0800 (中国标准时间)

new Date(Date.parse("2013-07-30 00:00:00"))
Tue Jul 30 2013 00:00:00 GMT+0800 (中国标准时间)