Assuming that Mar 10, 2014 6:40:45 AM is your input date format, This code will help:
var myDate = new Date('Mar 10, 2014 6:40:45 AM');
var reqDate = ((myDate.getMonth() + 1) + "/" + myDate.getDate() + "/" + myDate.getFullYear());
console.log(reqDate);
output
3/10/2014