JQuery Methods

Search element via Regex:

jQuery.expr[':'].regex = function (elem, index, match) {
            var matchParams = match[3].split(','),
                validLabels = /^(data|css):/,
                attr = {
                    method: matchParams[0].match(validLabels) ?
                                matchParams[0].split(':')[0] : 'attr',
                    property: matchParams.shift().replace(validLabels, '')
                },
                regexFlags = 'ig',
                regex = new RegExp(matchParams.join('').replace(/^s+|s+$/g, ''), regexFlags);
            return regex.test(jQuery(elem)[attr.method](attr.property));
        }
        
Usage:

  $("li:regex(id,menu[a-zA-Z]*)").click(function () {
                $(this).after($("#preloadAnimation").show()).fadeIn();
            });