由于采用了大量HTML5技术，Safari 5浏览器支持全屏播放和隐形字幕（closed caption），地理定位，拖拽属性，表格验证，Ruby，Ajax历史，分割元素（sectioning elements），EventSource和WebSocket等内容。

Heavy on HTML5, the new browser allows full-screen playback and closed captions; geolocation, sectioning elements, draggable attribute, forms validation, Ruby, AJAX History, EventSource and WebSocket.

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这三种属性一起控制着字幕滚动的样式、方向和持续时间。

Together, these three attributes control the style, direction, and duration of the scrolling in your marquee.

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这些属性控制着滚动字幕的速度和平滑度。

These attributes control the speed and smoothness of the scrolling marquee.

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