Jquery: Get Query string parameter value

// Scroll to section functionality based on query string
        if(document.location.search.length) {
            var position = getUrlParameter('position');
            var positionid = position.replace(/["']/g, "");
            $j("#"+positionid).trigger('click');
        }
        
        function getUrlParameter(name) {
            name = name.replace(/[\[]/, '\\[').replace(/[\]]/, '\\]');
            var regex = new RegExp('[\\?&]' + name + '=([^&#]*)');
            var results = regex.exec(location.search);
            return results === null ? '' : decodeURIComponent(results[1].replace(/\+/g, ''));
        }