function w3tc_show_minify_help() { W3tc_Lightbox.open({ id: 'w3tc-overlay', close: '', width: 800, height: 610, url: ajaxurl + '?action=w3tc_ajax&_wpnonce=' + w3tc_nonce + '&w3tc_action=minify_help', callback: function(lightbox) { jQuery('.btn-primary', lightbox.container).click(function() { lightbox.close(); }); } }); } jQuery(function($) { $('#minify__enabled').click(function() { var checked = $(this).is(':checked'); if (!checked) return; w3tc_show_minify_help(); }); });