Predictive and checking the address on the website

Have a website – maxandreev.com/onlime/
In the 2nd block, where the "Check connection" it is necessary to do predictive address entry (After the two entries of symbols a tooltip appears with the address on this letter).
An example of how this is implemented can be viewed on the website – (There in the 2nd unit the same way).

The expected cost, timing (need it today), examples of work, if available.