How can I get query string values in JavaScript?

You can get query string value by this function.

function getQueryStr(n) {

    var query = location.search.split('&'+n+'=')[1];

    if (!query) query= location.search.split('?'+n+'=')[1];

    return query? decodeURIComponent(query.split('&')[0]):null;

}

var urlPath = window.location.pathname.split( '/' );

then just do some string parsing on urlPath variable...

Hi Zaid,

Here is the small javascript function which can take variable as parameter

function getQuerystring(key)

 {  

key = key.replace(/[\\[]/,"\\\\\\[").replace(/[\\]]/,\\\\\\]); 

var regex = new RegExp("[\\\\?&]"+key+"=([^&#]*)"); 

var qs = regex.exec(window.location.href);

  if(qs == null)

alert("no Q string found..."); 

else alert(qs[1]);

 }

WE can get string values by using alert box("message")

var query = window.location.search;

JQUERY:

http://jquery-howto.blogspot.com/2009/09/get-url-parameters-values-with-jquery.html

Google :

JS : 

document.write(location.search);

Hello Zaid,

Just split up the parameters into an associative-array style:

var urlParams;

(window.onpopstate = function () {

    var match,

        pl     = /\\+/g,  // Regex for replacing addition symbol with a space

        search = /([^&=]+)=?([^&]*)/g,

        decode = function (s) { return decodeURIComponent(s.replace(pl, " ")); },

        query  = window.location.search.substring(1);

    urlParams = {};

    while (match = search.exec(query))

       urlParams[decode(match[1])] = decode(match[2]);

})();

Example querystring:

?i=somemore&mode=xxxx&sid=123456&enc=+Voala%20&empty

Result:

urlParams = {

    enc: "Voala",

    i: "somemore",

    mode: "xxxx",

    sid: "123456",

    empty: ""

}

alert(urlParams["mode"]);

// -> "front"

alert("empty" in urlParams);

// -> true

Server-side preprocessing with PHP and native JSON functions.

<script>var urlParams = <?php echo json_encode($_GET, JSON_HEX_TAG);?>;</script>

I found a best example for this. Please have a look on following URL:

http://www.darlesson.com/jquery/querystring/?language=en&province=Alberta&province=Ontario&province=Quebec