var LiveChatPeriodUpdater = null;

String.prototype.trim = function()
{
 return this.replace(/(?:^\s+|\s+$)/g, "");
}

function SendMessage()
{
 var customermessage = document.getElementById('textmessage').value.trim();
 document.getElementById('textmessage').value = '';
 if (customermessage != '')
 {
 var img = document.getElementById('livachat_ajax_loader');
 if (img != null)
 {
 img.style.display = 'inline';
 }
 var request = new Ajax.Updater(
 'livechat_messages',
 urlSendMessage,
 {
 method: 'get',
 parameters: { message: customermessage },
 onSuccess: function(transport, json) {
 var img = document.getElementById('livechat_ajax_loader');
 if (img != null) {
 img.style.display = 'none';
 }
 SetUpdater();
 },
 insertion: Insertion.Bottom
 }
 );
 }
}

function SetUpdater()
{
 //alert(LiveChatPeriodUpdater);
 if (LiveChatPeriodUpdater == null)
 {
 LiveChatPeriodUpdater = new Ajax.PeriodicalUpdater(
 'livechat_messages',
 urlUpdater,
 {
 frequency: frequency,
 decay: decay
 }
 );
 }
}

function LiveChatKeyPress(e) {
 if (e.keyCode == 13) {
 SendMessage();
 }
}