Jquery required is not validating

Dear All,
I have a page here http://183.78.169.53/scv/addRoute.php. I can add the rows now dynmically. My problem when submit I want the locations to be selected and the location cant be same. I have put this <select class=‘required’ but is not workning either too. Secondly I want to make sure the dwell time column is fields in hour:minute format. How can I do that too?

The jQuery validation library doesn’t exist on the server or in the directory where you specified in your HTML, check the file paths and then try validating the form again.

Dear Sgt Legend,
I have settle the jQuery validation library issue. So my problem now is how to make sure the location selected are not same. Secondly about the dwell time do you suggest the user key in or use a drop down for hour and minute separately?