in static/studio/static/js/FancyZoom.js [738:747]
function getShift(evt) {
var shift = false;
if (! evt && window.event) {
shift = window.event.shiftKey;
} else if (evt) {
shift = evt.shiftKey;
if (shift) evt.stopPropagation(); // Prevents Firefox from doing shifty things
}
return shift;
}