var siteUrl = 'http://example.org';

casper.test.setUp(function globalSetUp() {
    phantom.clearCookies();
});

var
    siteUrl = 'http://example.org',
    env     = require('system').env
;

casper.test.setUp(function globalSetUp() {
    phantom.clearCookies();
});

Declare environment as a variable
Declare environment as a variable
