移動: mouseover/out, mouseenter/leavecontainer.onmouseover = container.onmouseout = handler; function handler(event) { function str(el) { if (!el) return "null" return el.className || el.tagName; } log.value += event.type + ': ' + 'target=' + str(event.target) + ', relatedTarget=' + str(event.relatedTarget) + "\n"; log.scrollTop = log.scrollHeight; if (event.type == 'mouseover') { event.target.style.background = 'pink' } if (event.ty
