function forEachQSA(a,b){Array.prototype.forEach.call(document.querySelectorAll(a),b)}function replaceImageWithAlt(a,b,c){b=b||"",c=c||"",forEachQSA(a,function(a){var d=document.createTextNode(a.alt?b+a.alt+c:"");a.parentElement.replaceChild(d,a)})}location.search.indexOf("vo-guide")>-1&&(document.body.className+="vo-guide");