How do I update the location field when I chnge the latitude, longitude coordinates manually?

I am using jquery location picker plugin to take the entry of user's location through a map.

The problem that I 'm facing is that when I change the lat, long coodinates manually, the location field does not shift accordingly to the correct position however the marker does.

What is the solution?

Here is the map that I'm using http://ift.tt/1HAeglQ