Testing for IE with JavaScript

A quick one-liner that tests if the browser is Internet Explorer (Windows); useful if you have functions/methods only applicable to the beast in question:

 
 if (!/*@cc_on!@*/0) { return; };
 // IE code goes here...
 

For those of you wondering, the extra exclamation mark within the conditional compilation statement (cc_on!) double negates (!!) the zero, which means only Internet Explorer will return a value of FALSE for the condition.

Of course, it can also be used within an if … else situation:

 
 if (!/*@cc_on!@*/0) { alert("not IE"); }
 else { alert("IE"); }
 

Short but quite sweet.