The ignoreCase property is a flag that informs the user if case is to be ignored during pattern matching or not.
<html> <body> <script language="JavaScript"> <!-- var myPat = new RegExp("is", "i"); var str = "This is a test"; myArray = myPat.exec(str); document.write("The value of RegExp.ignoreCase is: " + "<b>"+ myPat.ignoreCase + "</b>"); --> </script> </body> </html>