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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)";
s += "\r\nÍøÒ³¿É¼ûÇøÓò¸ß£º"+ document.body.offsetHeight +" (°üÀ¨±ßÏߵĿí)";
s += "\r\nÍøÒ³ÕýÎÄÈ«ÎÄ¿í£º"+ document.body.scrollWidth;
s += "\r\nÍøÒ³ÕýÎÄÈ«Îĸߣº"+ document.body.scrollHeight;
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;
s += "\r\nÄãµÄÆÁÄ»ÉèÖÃÊÇ "+ window.screen.colorDepth +" Î»²ÊÉ«";
s += "\r\nÄãµÄÆÁÄ»ÉèÖà"+ window.screen.deviceXDPI +" ÏñËØ/Ó¢´ç";
alert(s);
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[·­Òë]High Performance JavaScript(018)

String Trimming  ×Ö·û´®ÐÞ¼ô
    Removing leading and trailing whitespace from a string is a simple but common task. Although ECMAScript 5 adds a native string trim method (and you should therefore start to see this method in upcoming browsers), JavaScript has not historically in ......

[·­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.
......

[·­Òë]High Performance JavaScript(030)

µÚʮՠ Tools  ¹¤¾ß
    Having the right software is essential for identifying bottlenecks in both the loading and running of scripts. A number of browser vendors and large-scale websites have shared techniques and tools to help make the Web faster and more efficient. This ......

[·­Òë]High Performance JavaScript(032)

Fiddler
    Fiddler is an HTTP debugging proxy that examines the assets coming over the wire and helps identify any loading bottlenecks. Created by Eric Lawrence, this is a general purpose network analysis tool for Windows that provides detailed reports on any browser or web request. ......

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<script>
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function isNumeric(strNumber) {
var newPar=/^(-|\+)?\d+(\.\d+)?$/
alert(newPar.test(strNumber)); }
 //¼ ......
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