EXT 中js语法请教
ext.js文件中有这样一段js代码(function(){ var ua = navigator.userAgent.toLowerCase(); var isStrict = document.compatMode == "CSS1Compat", isOpera = ua.indexOf("opera") > -1, isSafari = (/webkit|khtml/).test(ua), isIE = ua.indexOf("msie") > -1, isIE7 = ua.indexOf("msie 7") > -1, isGecko = !isSafari && ua.indexOf("gecko") > -1, isBorderBox = isIE && !isStrict, isWindows = (ua.indexOf("windows") != -1 || ua.indexOf("win32") != -1), isMac = (ua.indexOf("macintosh") != -1 || ua.indexOf("mac os x") != -1), isLinux = (ua.indexOf("linux") != -1), isSecure = window.location.href.toLowerCase().indexOf("https") === 0;})();
这段代码应该是加载后自动执行，不知道这没写的用以何在？是不是为了防止命名冲突？
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