Case-insensitive, you can add the i flag:

 
 
package{
  import flash.display.Sprite;
   import flash.utils.*;
  public class Main extends Sprite{
    public function Main(){
        var reCase:RegExp = new RegExp("abc","i");
        trace(reCase.test("aBc"));  
    }
  }
}

Related examples in the same category

1.	Creating a Regular Expression Object
2.	To flag it to match globally and multiline, the following will work:
3.	Regular expression /\w/ is created in ActionScript
4.	Matching Using a Regular Expression Object
5.	To know whether at least one match exists.
6.	Use the exec() method.
7.	RegExp("(A\|BC)* (A);(B)* (C) (A\|B\|C)", "i")
8.	String Methods and Regular Expressions
9.	To escape a character, simply preface it with a backslash (\). This goes for the backslash character as well.
10.	Use ranges with the dash character (-), and you can have multiple ranges in one character class, as well as combine ranges with single characters
11.	invert a character class by using a caret (^) immediately after the open bracket ([).
12.	Quantifiers
13.	To match an optional character or sequence, use the question mark quantifier (?).
14.	(*) quantifier matches zero or more times:

Case-insensitive, you can add the i flag: : RegExp « Regular Expressions « Flash / Flex / ActionScript

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