/* THIS FUNCTION IS TO FETCH INT PARAMETER VALUES */
function getParametera(param) {
var val = document.URL;
var url = val.substr(val.indexOf(param))
var n=parseInt(url.replace(param+"=",""));
alert(n);
}
getParametera("page");
getParametera("pagee");

/*THIS FUNCTION IS TO FETCH STRING PARAMETER*/
function getParameter(param) {
var val = document.URL;
var url = val.substr(val.indexOf(param))
var n=url.replace(param+"=","");
alert(n);
}
getParameter("str");

CODE BY BLOGGER PLUG N PLAY
http://bloggerplugnplay.blogspot.in/2012/08/how-to-get-url-parameter-in-javascript.html