The JavaScript replace function takes two arguments:
The first is a regular expression (or a string)
The second is a replacement string
var StartString = 'Rub';
var ReplacedString = StartString.replace(/[rb]/gi,'n');
document.write(ReplacedString);//Result is nun
The 'gi' makes it a global (g), case-insensitive (i) replacement.
Related articles:
JavaScript Regular Expressions
JavaScript Regular Expression Case-Sensitivity
JavaScript Regular Expression Square Brackets
