convert string in hh:mm am/pm to date js
var input = '10:23 PM',
matches = input.toLowerCase().match(/(\d{1,2}):(\d{2}) ([ap]m)/),
output = (parseInt(matches[1]) + (matches[3] == 'pm' ? 12 : 0)) + ':' + matches[2] + ':00';
console.log(output); // 22:23:00