WCF Service call from ajax

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C#

Javascript

WCF

Hello, I am trying to call WCF Service from other project using the local address. I have two projects in same solution explorer. One project has the services and the other is a web application where I am using Ajax in javascript to call the WCF Service.
Following is my javascript code,

function sclick() {
    alert("m here");
    $.ajax({
        type: "POST",
        url: "http://localhost:4780/Service1.svc/myfunction",
        contentType: "application/json; charset=utf-8 ",
        dataType: "json",
        success: success,
        error: fail
    })

}

function success(result) {
    alert(result);
    //alert("Success" + result.myfunctionResult);
}

function fail(result) {
    alert("Fail..... " + result.statusText + ": " + result.status);
}

flow goes to success funtion but I get null in result object. URL in ajax part is the URL I got by viewing the service1.svc file in browser.
Can anyone please tell me where I am going wrong!