showLocalizedMessage.js

function showAlertDialog() {
    var localizedResult = Xrm.Utility.getResourceString("odx_/resx/messages", "qualifyingLeadMessage");

    var alertStrings = {
        confirmButtonLabel: "OK",
        text: localizedResult
    };
    var alertOptions = {
        height: 200,
        width: 400
    };

    Xrm.Navigation.openAlertDialog(alertStrings, alertOptions);
}