function liveMessengerOpen(id){
	var width = 500;
	var height = 500;
	var x = (screen.width-width)/2; 
	var y = (screen.height-height)/2; 
	window.open('http://settings.messenger.live.com/Conversation/IMMe.aspx?invitee='+id+'@apps.messenger.live.com&mkt=pt-BR','_blank','height='+height+'px,width='+width+'px,top='+y+'px,left='+x+'px');
}

var liveMessenger_status = 'Offline';
function liveMessengerStatus(){
	var liveMessenger_ID = '78f7672cbdbe140c'; /* ID do MSN do cliente */
	$.ajax({
		url: 'http://messenger.services.live.com/users/'+liveMessenger_ID+'@apps.messenger.live.com/presence?dt=&mkt=pt-BR&cb=LiveMessenger',
		dataType: 'jsonp',
		jsonp: false,
		jsonpCallback: 'LiveMessenger',
		success: function(data) {
			if(data.status == 'Offline'){
				var liveMessenger_btn = '<img src="images/atendimento-offline.jpg" />'; /* Conteúdo HTML para status OFFLINE */
			}else{
				var liveMessenger_btn = '<a href="javascript:liveMessengerOpen(\''+liveMessenger_ID+'\');"><img src="images/atendimento-online.jpg" /></a>'; /* Conteúdo HTML para status ONLINE */
				data.status = 'Online';
			}
			if(liveMessenger_status != data.status){
				$('#live_messenger').html(liveMessenger_btn); /* ID do elemento */
				liveMessenger_status = data.status;
			}
			setTimeout('liveMessengerStatus()', 15000);
		}
	});
}
$(function(){
	liveMessengerStatus();
})

/*
http://settings.messenger.live.com/Conversation/IMMe.aspx?invitee=78f7672cbdbe140c@apps.messenger.live.com&mkt=pt-BR&
useTheme=true&themeName=gray&
foreColor=676769&back
Color=DBDBDB&link
Color=444444&border
Color=8D8D8D&button
ForeColor=99CC33&button
BackColor=676769&button
BorderColor=99CC33&buttonDisabled
Color=F1F1F1&header
ForeColor=729527&header
BackColor=B2B2B2&menuForeColor=676769&menu
BackColor=BBBBBB&chatFore
Color=99CC33&chatBackColor=EAEAEA&chatDisabled
Color=B2B2B2&chat
ErrorColor=760502&chat
LabelColor=6E6C6C
*/