看如下的javascript脚本: if (window.XMLHttpRequest) { //Mozilla, Safari,...IE7 alert('Mozilla, Safari,...IE7 '); if(!window.ActiveXObject){ // Mozilla, Safari,... alert('Mozilla, Safari'); } else { alert('IE7'); } } else { alert('IE6'); } 看看运行效果: script language="javascript" if (window.XMLHttpRequest) ...
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