[uiprops] use lazystr and update some variables usage in css
to get a chance to change style without having to change all properties.
Also had missing boxHeader.png file (formerly header.png).
$(document).ready(function() {
$('a.rhythm').click(function (event){
$('div#pageContent').toggleClass('rhythm_bg');
$('div#page').toggleClass('rhythm_bg');
event.preventDefault();
});
});