Calling Action using javascript with web api request in mscrm

// how to Call action Using javascript

function hanleWebLead() {

    var actionName = new_actioncallusingjs;

   

    //defien action input parameters

    var aactionParameters = {

        "topic": $("#topic").val(),

        "firstName": $("#firstName").val(),

        "lastName": $("#lastName").val()

    };

    var actionResponse = activieCustomAction(actionName, aactionParameters);

    alert(actionResponse.newLeadUrl);

}

function activateCustomAction() {

    var Id = Xrm.Page.data.entity.getId().replace('{', '').replace('}', '');

    var serverURL = Xrm.Page.context.getClientUrl();

    // pass the id as inpurt parameter

    var data = {

        "recordid": Id

    };

    var req = new XMLHttpRequest();

    // specify name of the entity, record id and name of the action in the Wen API Url

    req.open("POST", serverURL + "/api/data/v8.2/accounts(" + Id + ")/Microsoft.Dynamics.CRM.new_actioncallusingjs", true);

    req.setRequestHeader("Accept", "application/json");

    req.setRequestHeader("Content-Type", "application/json; charset=utf-8");

    req.setRequestHeader("OData-MaxVersion", "4.0");

    req.setRequestHeader("OData-Version", "4.0");

    req.onreadystatechange = function () {

        if (this.readyState == 4 /* complete */) {

            req.onreadystatechange = null;

            if (this.status == 200) {

                var data = JSON.parse(this.response);

                alert(data);

            } else {

                var error = JSON.parse(this.response).error;

                alert(error.message);

            }

        }

    };

    // send the request with the data for the input parameter

    req.send(window.JSON.stringify(data));

}