Write a script in JavaScript

Employer
Aleksandr
Project parameters
Type of cooperationOne-time project
SectionWeb development, Web programming
Prepaymentwithout prepayment
Payment methodsElectronic money
Acceptance of requestsfrom Nov 25, 2017 until Dec 3, 2017
Project description
You need a script to suggest calling back the visitor to an e-mail in JavaScript. Information about the application should go to Yandex.Metrica. In its functionality, the script will be similar to the script from the CallHunter system.
Project tags