Javascript Clock with time based on NTP server that is pulled using PHP

[bubbasheeko]

I am developing a time card app, but have run into an issue that I didn't think of when I started the project. 

 

I want to display a digital clock on the screen that auto increments.  So this would be Javascript.  However, the problem I didn't think of at the time I came up with the idea was where the Javascript would get the time.  Javascript defaults to the time of the user's computer.  Obviously for a timecard app I would not want the user changing the time on their computer to look like they were in on time.  So, I then thought of just using their main computer to pull the time, but this system is accessible by each of the employees.  Then it hit me.  I could pull the time from a NTP server.

 

Now, I know how to pull the time from the NTP server with PHP.  What I don't know is how I can get Javascript to grab that time and start incrementing it so that it can be used when the 'punch' form is submitted.  I already have a plan if the time can not be grabbed from the NTP server.

 

If anybody could get me started or point me in the right direction that would be great!

 

 

[bubbasheeko]

To clarify this a bit more.  The Javascript will keep the clock up to date, but I need to use a NTP server to start it off.  I am not aware of how to do this in Javascript, or if it could be provided by a script I already have in PHP.