Setting site root/URL for both local and remote development

scripts.js

var siteURL  = 'http://www.website.com/'; 	
if ( document.domain == 'localhost' ) siteURL = "http://localhost/website/";

// Example
$('.element').css('background-image', 'url("' + siteURL + 'assets/img/background.png")');
$('.element').next().find('img').attr('src', siteURL + 'assets/img/image.png');