query string from object js
function objectToQueryString(obj) {
var str = [];
for (var p in obj)
if (obj.hasOwnProperty(p)) {
str.push(encodeURIComponent(p) + "=" + encodeURIComponent(obj[p]));
}
return str.join("&");
}
var person = { first_name : "Marty",last_name : "Mcfly"};
var queryString=objectToQueryString(person); //"first_name=Marty&last_name=Mcfly"