Using Methods in Javascript Replace Method

code-1.js

// Turns the vowel characters into random cases.
String.prototype.RandomCase = function(){
	return(
		this.replace( 
			new RegExp("([aeiou]{1})", "gi"), 
			// Here, we are passing in a nameless function as the parameter for 
			// the "replace" argument of the String Replace method. It uses the $1 
			// to refer to the grouping of vowels found in the regular expression.
			function($1){ 
				// Get a random number.
				if (Math.random() > .5){
					// Lowercase this one.
					return( $1.toLowerCase() );
				} else {
					// Uppercase this one.
					return( $1.toUpperCase() );
				}
			}
		)
	);
}

// Create a test string with plenty of vowels.
var strTest = "Ben Nadel is a Pretty Nice Guy. I really like Kinky Solutions and his Coding Style.";

// Alert the random-cased string.
alert( strTest.RandomCase() );

code-2.js

String.prototype.GetSmallWords = function(){
	// Declare the array that will hold the small words matches.
	var arrWords = new Array();

	// Take the string value and get copy the small words into an array.
	this.replace( 
		new RegExp("(a|and|be|do|for|go|he|hi|i|in|is|no|of|on|the|to)", "gi"),

		// This replace function takes the word found and adds the
		// word to the locally-defined array of short words in the
		// parent function. 
		function( strWord ){ 
			arrWords[ arrWords.length ] = strWord;
		}
		);
	
	// Return the array of little words.
	return( arrWords ); 
}

// Create a test string with small words.
var strTest = "Ben Nadel is a Pretty Nice Guy. I really like Kinky Solutions and his Coding Style.";

// Alert the array of small words.
alert( strTest.GetSmallWords() );