Access-Control-Allow-Origin. error when I call WCF service from javascript

See more:

Javascript

WCF

I'm making a call to WCF services from javascript.
When I run the application in Console I'm getting the following error:

**Failed to load resource: the server responded with a status of 405 (Method Not Allowed)
 http://localhost:8732/IServices/RoleService/json/Role/{engineer}
 XMLHttpRequest cannot load
 http:/http://localhost:8732/IServices/RoleService/json/Role/{engineer}Origin
 http://localhost:3952  is not allowed by Access-Control-Allow-Origin.**

My code is like..

<script src="~/Scripts/jquery-1.5.2.min.js" type="text/javascript"></script>
<script language="javascript" type="text/javascript">
debugger
function GetRoles() {
$("#btnWCFREST").click(function () {
  $.ajax({
    async: true,
    url:"http://localhost:8732/IServices/RoleService/json/Role/doctor",
    type: "GET",
    dataType: "json",
    contentType: "application/json; charset=utf-8",
    success: function (msg) {
                   alert(msg);
               },
    error: function (msg) {
                   alert("Failed");
               }
    });
    });
    }
  </script>

How can I fix this issue?
I am running the application in localhost
Thanks,,