CRM 2011 JAVASCRIPT- CONTACT OLUSTURMA

function OnLoad() {
    if (Xrm.Page.ui.getFormType() == 1) {
    }
    else if (Xrm.Page.ui.getFormType() != 1) {
        DisableFields();
    }
}

function NewContact() {

    if (
            Xrm.Page.getAttribute("new_firstname").getValue() == null &&
            Xrm.Page.getAttribute("new_lastname").getValue() == null &&
            Xrm.Page.getAttribute("new_phonenumber").getValue() == null) {
        MakeFieldsNonMandatory();
    }
    else if (
                Xrm.Page.getAttribute("new_firstname").getValue() != null &&
                Xrm.Page.getAttribute("new_lastname").getValue() != null &&
                Xrm.Page.getAttribute("new_phonenumber").getValue() != null &&
                Xrm.Page.data.entity.attributes.get("customerid").getValue() == null) {
        CreateContact();
        Xrm.Page.getAttribute("new_phonenumber2").setValue(Xrm.Page.getAttribute("new_phonenumber").getValue());
        DisableFields();
    }
    else {
        MakeFieldsMandatory();
        //Xrm.Page.ui.controls.get("from").setVisible(false);
    }
}

function CreateContact() {
    // Get the CRM URL
    var serverUrl = Xrm.Page.context.getServerUrl();

    // Cater for URL differences between on premise and online
    if (serverUrl.match(/\/$/)) {
        serverUrl = serverUrl.substring(0, serverUrl.length - 1);
    }

    // Specify the ODATA end point (this is the same for all CRM 2011 implementations)
    var ODATA_ENDPOINT = "/XRMServices/2011/OrganizationData.svc";

    // Specify the ODATA entity collection
    var ODATA_EntityCollection = "/ContactSet";

    // Define an object for the CRM record you want created
    var CRMObject = new Object();

    // Define attribute values for the CRM object
    CRMObject.FirstName = Xrm.Page.getAttribute("new_firstname").getValue();
    CRMObject.LastName = Xrm.Page.getAttribute("new_lastname").getValue();
    CRMObject.Telephone1 = Xrm.Page.getAttribute("new_phonenumber").getValue();

    //Parse the entity object into JSON
    var jsonEntity = window.JSON.stringify(CRMObject);

    //Asynchronous AJAX function to Create a CRM record using OData
    $.ajax({
        type: "POST",
        contentType: "application/json; charset=utf-8",
        datatype: "json",
        url: serverUrl + ODATA_ENDPOINT + ODATA_EntityCollection,
        data: jsonEntity,
        beforeSend: function (XMLHttpRequest) {
            //Specifying this header ensures that the results will be returned as JSON.    
            XMLHttpRequest.setRequestHeader("Accept", "application/json");
        },
        success: function (data, textStatus, XmlHttpRequest) {
            //This function will trigger asynchronously if the Retrieve was successful
            //alert("ajax call successful");
            var NewCRMRecordCreated = data["d"];
            var FullName = Xrm.Page.getAttribute("new_firstname").getValue() + " " + Xrm.Page.getAttribute("new_lastname").getValue();
            SetLookupValue("customerid", NewCRMRecordCreated.ContactId, FullName, "contact");
        },
        error: function (XmlHttpRequest, textStatus, errorThrown) {
            //This function will trigger asynchronously if the Retrieve returned an error
            alert("ajax call failed");
        }
    });
}

function SetLookupValue(fieldName, id, name, entityType) {
    if (fieldName != null) {
        var lookupValue = new Array();
        lookupValue[0] = new Object();
        lookupValue[0].id = id;
        lookupValue[0].name = name;
        lookupValue[0].entityType = entityType;
        Xrm.Page.getAttribute(fieldName).setValue(lookupValue);
    }
}

function DisableFields() {
    Xrm.Page.ui.controls.get("new_firstname").setDisabled(true);
    Xrm.Page.ui.controls.get("new_lastname").setDisabled(true);
    Xrm.Page.ui.controls.get("new_phonenumber").setDisabled(true);
}

function MakeFieldsMandatory() {
    Xrm.Page.data.entity.attributes.get("new_firstname").setRequiredLevel("required");
    Xrm.Page.data.entity.attributes.get("new_lastname").setRequiredLevel("required");
    Xrm.Page.data.entity.attributes.get("new_phonenumber").setRequiredLevel("required");
}

function MakeFieldsNonMandatory() {
    Xrm.Page.data.entity.attributes.get("new_firstname").setRequiredLevel("none");
    Xrm.Page.data.entity.attributes.get("new_lastname").setRequiredLevel("none");
    Xrm.Page.data.entity.attributes.get("new_phonenumber").setRequiredLevel("none");
}