Violent sweat, a question about JavaScript parseint ()

During the last few days of system creation, I suddenly found that the time selected from the Time Selection box always reported an incorrect format. I found through debug that an error was reported when I used parseint, the strange thing is that this method converts... 07 is okay, but 08,09 is converted to 0. Search on www.yahoo.cn and get the following article from dear friend, then the fog is blurred. In the past, parseint () had two parameters, and the 2nd parameter pointed out the hexadecimal format to be converted, if the first 1st parameters start with 0 but do not specify the hexadecimal number of the 2nd parameters, the function is converted to an octal value by default, so it is converted from to 0.