This is one of the additions to the String object to support regular expressions.

The search pattern locates matches, which are then replaced by the string value in the second argument.

The value is modified in place.

The replacement text can make use of the numbered sub-expression references and can use them in the replaced string.

Warnings:

• This resets the lastIndex property of a RegExp object to 0.

Example code:

   // Simple replacement

   myString = "javascript, 'JAVASCRIPT', JavaScript";

   myString.replace(/javascript/ig, "JavaScript");

   document.write(myString);

   myString.replace(/^.*\'([^\']*)\'.*$/, "---''$1''---")

Cross-references:

ECMA 262 edition 3 - section - 15.5.4.11