#----------------------------------------------------------------------
# Here is the fundamental code to match JavaScript code.
# This includes regular expressions and quoted strings.
#----------------------------------------------------------------------
my ($regexJSCode) = qr{
	# First, we'll list things we want 
	# to match, but not throw away

	(?: 
		# Match a regular expression (they start with ( or =).
		# Then the have a slash, and end with a slash.
		# The first slash must not be followed by * and cannot contain
		# newline chars. eg: var "re = /\*/;" or "a = b.match (/x/);"
	
		[\(=] \s*
		/
		(?:
			# char class contents
			\[ \^? ]? (?: [^]\\]+ | \\. )* ]
			|
			# escaped and regular chars (\/ and \.)
			(?: [^[\\\/]+ | \\. )*
		)*
		/
		(?:
			[gi]*
			# next characters are not word characters
			(?= [^\w] )
		)
	) 

	| # or double quoted string
	(?: 
		"[^"\\]* (?:\\.[^"\\]*)*" [^"'/]* 
	)+  

	| # or single quoted constant
	(?: 
		'[^'\\]* (?:\\.[^'\\]*)*' [^"'/]* 
	)+  
}x;

#----------------------------------------------------------------------
# Here is the fundamental code to match JavaScript comments and comment blocks.
#----------------------------------------------------------------------
my ($regexJSComments) = qr{
	# or we'll match a comment. Since it's not in the
	# $1 parentheses above, the comments will disappear
	# when we use $1 as the replacement text.

	/ # (all comments start with a slash)
	(?:    
		# traditional C comments
		(?: 
			\* [^*]* \*+ 
			(?: [^/*] [^*]* \*+ )* 
			/ 
		)

		| # or C++ //-style comments
		(?: 
			/ [^\n]*
		)
	)
}x;

#----------------------------------------------------------------------
# Get rid of all comments from the string.
#----------------------------------------------------------------------
$strOutput =~ s{	
	( $regexJSCode ) | $regexJSComments
}{$1}gsx;



##</code><code>##

function test (str) {
	// A comment.
	alert ("test");	

	var reForwardSlash = /\//;
	var reBackslash = /\\/;
	
	if (str.match(regexForwardslash) && str.match(regexBackslash)) {
		return true;
	}

}

##</code><code>##

function test (str) {
        alert ("test");
        var reForwardSlash = /\
        var reBackslash = /\\/;
        if (str.match(regexForwardslash) && str.match(regexBackslash)) {
                return true;
        }
}

##</code><code>##

function test (str) {
	// A comment.

	var reForwardSlash = /\//;
	var reBackslash = /\\/;
	
	if (str.match(regexForwardslash) && str.match(regexBackslash)) {
		return true;
	}

}

##</code><code>##

function test (str) {
        var reForwardSlash = /\//;
        var reBackslash = /\\/;
        if (str.match(regexForwardslash) && str.match(regexBackslash)) {
                return true;
        }
}