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javascript 浏览器类型和版本号检测代码(兼容多浏览器)

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<title>javascript检测浏览器类型和版本号（兼容各浏览器） </title> 
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<body onload="javascript:screenWH();"> 
<input type="text" id="screenWH"/> 
<input type='button' onclick='notEmpty()' value='Form Checker' />

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　　javascript 浏览器检测代码精简版

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