Get query string in javascript from URL

function getUrlParameterByName(name) {

     
        name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
        var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
        results = regex.exec(location.search);
        return results === null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
     
}

URL: http://www.nishitvaghela.blogspot.com?page=2&size=10

getUrlParameterByName('page') = 2