xhr request should be in a separeted function

[Walidmash]

To prevent repeating the code, XHR request should be in separate function as you will be using it more than once, especially that you are handing more than one API. https://github.com/facg3/msn-AutoComplete/blob/8c372d2136eec1a1ef9a7ffdb6da271cd51ef2f3/public/dom.js#L10

[Salam-Dalloul]

thanks for this note :)