javascript - Date.parse showing error -

i using date.js parse string of date , time

var start_time='10-jun-15 12:00 am'; var end_time='10-jun-15 12:00 pm'; 

when alerts

alert(date.parse(start_time));  alert(date.parse(end_time)); 

the first 1 shows

 wed jun 10 2015 12:00:00 gmt+0530 (india standard time) 

and second 1 shows

null 

how solve this?.thanks in advance

edited:

i've checked date format in both chrome , ff. firefox doesn't understand format, in chrome works fine.

i used '10 jun 2015 12:00 pm' format , worked fine in both browsers.

so should try removing dashes , use full year or use other date format.

the date should in rfc2822 or iso 8601 date format.