Concatenation in jQuery

Question

var os = $.client.os; // mac
var browser = $.client.browser; // firefox
var browserversion = $.client.browserversion; // 3
$('#root').addClass( os + browser + browserversion );

.. results in <div id="root" class="macfirefox3">. How do I add spaces between them?

Answer 1

$('#root').addClass( os + " " + browser + " " + browserversion );