var cache = Array();

function getSectionContent(sectionId, url)
{ 
	if (cache[url] == undefined)
	{
		var xmlHttp;
		xmlHttp=GetXmlHttpObject(function() { putHTMLCode(xmlHttp, sectionId, url); });
		xmlHttp.open("GET", url , true);
		xmlHttp.send(null);
	}
	else
	{
		document.getElementById(sectionId).innerHTML=cache[url];
	}
} 

function putHTMLCode(xmlHttp, sectionId, url) 
{ 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
	{ 
		cache[url] = xmlHttp.responseText;
		document.getElementById(sectionId).innerHTML=xmlHttp.responseText 
	} 
} 

function GetXmlHttpObject(handler)
{ 
	var objXmlHttp=null

	if (navigator.userAgent.indexOf("Opera")>=0)
	{
		// This doesn't work in Opera
		return 
	}
	if (navigator.userAgent.indexOf("MSIE")>=0)
	{ 
		var strName="Msxml2.XMLHTTP"
		if (navigator.appVersion.indexOf("MSIE 5.5")>=0)
			strName="Microsoft.XMLHTTP"
		try
		{ 
			objXmlHttp=new ActiveXObject(strName)
			objXmlHttp.onreadystatechange=handler 
			return objXmlHttp
		} 
		catch(e)
		{ 
			// Scripting for ActiveX might be disabled
			return 
		} 
	} 
	if (navigator.userAgent.indexOf("Mozilla")>=0)
	{
		objXmlHttp=new XMLHttpRequest()
		objXmlHttp.onload=handler
		objXmlHttp.onerror=handler 
		return objXmlHttp
	}
}