Slug function in JS matching the Laravel 4 implementation (Str::slug) - Note: does not include the transliteration of a UTF-8 value to ASCII

str.slug.js

function slug(title, separator) {
	if(typeof separator == 'undefined') separator = '-';

	// Convert all dashes/underscores into separator
	var flip = separator == '-' ? '_' : '-';
	title = title.replace(flip, separator);

	// Remove all characters that are not the separator, letters, numbers, or whitespace.
	title = title.toLowerCase()
			.replace(new RegExp('[^a-z0-9' + separator + '\\s]', 'g'), '');

	// Replace all separator characters and whitespace by a single separator
	title = title.replace(new RegExp('[' + separator + '\\s]+', 'g'), separator);

	return title.replace(new RegExp('^[' + separator + '\\s]+|[' + separator + '\\s]+$', 'g'),'');
}

exactly what I needed . thanks