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<body><SCRIPT LANGUAGE="JavaScript">
var  s = "";
s += "\r\nÍøÒ³¿É¼ûÇøÓò¿í£º"+ document.body.clientWidth;
s += "\r\nÍøÒ³¿É¼ûÇøÓò¸ß£º"+ document.body.clientHeight;
s += "\r\nÍøÒ³¿É¼ûÇøÓò¿í£º"+ document.body.offsetWidth  +" (°üÀ¨±ßÏߺ͹ö¶¯ÌõµÄ¿í)";
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s += "\r\nÍøÒ³±»¾íÈ¥µÄ¸ß£º"+ document.body.scrollTop;
s += "\r\nÍøÒ³±»¾íÈ¥µÄ×ó£º"+ document.body.scrollLeft;
s += "\r\nÍøÒ³ÕýÎIJ¿·ÖÉÏ£º"+ window.screenTop;
s += "\r\nÍøÒ³ÕýÎIJ¿·Ö×ó£º"+ window.screenLeft;
s += "\r\nÆÁÄ»·Ö±æÂʵĸߣº"+ window.screen.height;
s += "\r\nÆÁÄ»·Ö±æÂÊµÄ¿í£º"+ window.screen.width;
s += "\r\nÆÁÄ»¿ÉÓù¤×÷Çø¸ß¶È£º"+ window.screen.availHeight;
s += "\r\nÆÁÄ»¿ÉÓù¤×÷Çø¿í¶È£º"+ window.screen.availWidth;
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[·­Òë]High Performance JavaScript(023)

Data Formats  Êý¾Ý¸ñʽ
    When considering data transmission techniques, you must take into account several factors: feature set, compatibility, performance, and direction (to or from the server). When considering data formats, the only scale you need for comparison is speed.
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[·­Òë]High Performance JavaScript(024)

Data Format Conclusions  Êý¾Ý¸ñʽ×ܽá
    Favor lightweight formats in general; the best are JSON and a character-delimited custom format. If the data set is large and parse time becomes an issue, use one of these two techniques:
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[·­Òë]High Performance JavaScript(026)

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    Even though JavaScript is often blamed for being slow, there are parts of the language that are incredibly fast. This should come as no surprise, since JavaScript engines are built in lower-level languages and are therefore compiled. Thou ......

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