var serviceObj = null;
 
// Initializes the widget
function init() {
    try {
        serviceObj = device.getServiceObject("Service.Messaging",
            "IMessaging");
    } catch (ex) {
        alert("Service object cannot be found.");
        return;
    }
}

// Removes the message which is selected in the list box.
function removeMessage() {
    // Get a reference to SELECT object which contains the list of messages
    var messageList = document.getElementById("messageList");
 
    var criteria = new Object();
    // Find the selected messages
    for (var msgIndex = 0; msgIndex < messageList.length; msgIndex++) {
        if (messageList.options[msgIndex].selected) {
            // Get message id of the selected message
            var messageId = messageList.options[msgIndex].value;
            // Radix of message id integer value
            var radix = 10;
            // Get numeric representation of the message id
            criteria.MessageId = parseInt(messageId, radix);
            // Delete the message
            var result = serviceObject.IMessaging.Delete(criteria);
            if (result.ErrorCode !== 0) {
                alert("Error in deleting messages");
                break;
            }
            // Remove message record from selection list
            messageList.remove(msgIndex);
            msgIndex = msgIndex - 1;
        }
    }
    getMessageList();
}