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/*! is.js |
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|
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(c) 2001 Douglas Crockford |
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2001 June 3 |
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*/ |
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|
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// is |
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|
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// The -is- object is used to identify the browser. Every browser edition |
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// identifies itself, but there is no standard way of doing it, and some of |
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// the identification is deceptive. This is because the authors of web |
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// browsers are liars. For example, Microsoft's IE browsers claim to be |
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// Mozilla 4. Netscape 6 claims to be version 5. |
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|
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var is = { |
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ie: navigator.appName == 'Microsoft Internet Explorer', |
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java: navigator.javaEnabled(), |
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ns: navigator.appName == 'Netscape', |
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ua: navigator.userAgent.toLowerCase(), |
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version: parseFloat(navigator.appVersion.substr(21)) || |
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parseFloat(navigator.appVersion), |
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win: navigator.platform == 'Win32' |
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} |
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/*!* |
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* preserve this comment, too |
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*/ |
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is.mac = is.ua.indexOf('mac') >= 0; |
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if (is.ua.indexOf('opera') >= 0) { |
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is.ie = is.ns = false; |
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is.opera = true; |
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} |
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if (is.ua.indexOf('gecko') >= 0) { |
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is.ie = is.ns = false; |
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is.gecko = true; |
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} |
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|
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/*@cc_on |
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/*@if (@_win32) |
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if (is.ie && is.win) |
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document.write("PASS: IE/win honored conditional comment.<br>"); |
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@else @*/ |
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if (is.ie && is.win) |
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document.write("FAIL: IE/win did not honor multi-line conditional comment.<br>"); |
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else |
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document.write("PASS: Non-IE/win browser ignores multi-line conditional comment.<br>"); |
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/*@end |
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@*/ |
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|
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var recognizesCondComm = true; |
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//@cc_on/* |
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recognizesCondComm = false; |
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//@cc_on*/ |
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|
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if ((is.ie && is.win) == recognizesCondComm) |
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document.write("PASS: IE/win honored single-line conditional comment.<br>"); |
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else |
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document.write("FAIL: Non-IE/win browser did not ignore single-line conditional comment.<br>"); |
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|
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// hello |
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//@cc_on/* |
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// world |
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//@cc_on*/ |
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//@cc_on/* |
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'hello'; |
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/*!* preserved */ |
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/*!* preserved */ |
