Highlights numerical string in numerical string, while both strings are free formatted and containing more then just digits

highlight-numerical.js

function highlightNumerical(searchString, inString) {
	// http://jsfiddle.net/meglio/p9KUV/

	if (typeof searchString == "object") {
		if (searchString.length)
			searchString = searchString[0]
		else
			return inString
	}
	var prefix = '<strong class="highlight">', suffix = '</strong>',
		normSearch = $.trim(searchString.replace(/\D/g, ''))
	if (normSearch == '')
		return inString

	var expr = '('+ normSearch.split('').join('\\D*') + ')',
		r = new RegExp(expr, 'g');
	return inString.replace(r, prefix+'$1'+suffix);
}