IE7/8 background-image
by Jimmy Mabey
JavaScript
var span = $('<span>').css('background-image', 'url(http://jsfiddle.net/img/logo.png)');
$('body').append(
'css("background-image") = ' + span.css('background-image') + '<br>'
+ 'style.backgroundImage = ' + span.get(0).style.backgroundImage
);