// JavaScript Document
var navigations;
var headers;
var header = 0;

function getHeaders()
{
	try
	{
		if(!headers)
		{
			sendHttpRequest('_system/_JsonStringBuilder.php?f=getHeaders()');
			var jsonText = httpRequest.responseText;
			var jsonData = jsonParse(jsonText);
			headers = jsonData.Headers;
		}
		if(headers.length > 0)
		{
			document.getElementById('header').getElementsByTagName('img').item(0).src = headers[header++].Path;
	
			if(header == headers.length)
				header = 0;
								
			if(headers.length > 1)
				setTimeout('getHeaders()', 15000);
		}
	}
	catch (ex)
	{
		alert('DOM Error while trying to load header:\n' + ex);
	}	
}