In call the following URL in Javascript.
var par = \"Participant.aspx?ID=\" + Id + \"&NAME=\" + Name+ \"&FIRSTNAME=\" + Firstname;
Some
hey there is another way:
before passing it to query string just replace:
.Replace("&","%26");
on another page it automatically read %26 as &, but then also it not read as &, just again replace:
.Replace("%26","&");