var TopBannerDivArr=new Array();
var TopBanner_cnt ;
var TopCur_Banner=0;
var TopBannerInterval;

function TopBannerXmlload() {
	var xmlDOM = call_XML("/xml/top_banner.xml", "");
	var objList = xmlDOM.getElementsByTagName("item");
	TopBanner_cnt = objList.length;
	for(var i=0;i < TopBanner_cnt; i ++){
		TopBannerDivArr[i]="<a href='"+objList[i].getElementsByTagName("url")[0].firstChild.nodeValue+"'><img src='"+objList[i].getElementsByTagName("img")[0].firstChild.nodeValue+"' /></a>";
	}
}

function TopBannerChange(a){
	TopCur_Banner=TopCur_Banner+a
	if(TopCur_Banner < 1) {
		TopCur_Banner=1;
		TopCur_Banner=TopBanner_cnt;
	}
	
	if(TopCur_Banner > TopBanner_cnt) {
		TopCur_Banner=1;
	}
	document.getElementById('TopBannerDiv').innerHTML = TopBannerDivArr[TopCur_Banner-1];
}

TopBannerXmlload();
TopBannerChange(1)

TopBannerInterval = setInterval("TopBannerChange(1)",4000);
function TopBannerClearInterval(){
	clearInterval(TopBannerInterval);
}

function TopBannerStartInterval() {
	TopBannerInterval = setInterval("TopBannerChange(1)",4000);
} 

function call_XML(URL, str, call_back_function) {
	if (window.XMLHttpRequest){ // if Mozilla, Safari etc
		objRequest=new XMLHttpRequest()
		if (objRequest.overrideMimeType)
			objRequest.overrideMimeType('text/xml')
	}
	else if (window.ActiveXObject){ // if IE
		try {
			objRequest=new ActiveXObject("Msxml2.XMLHTTP");
		} 
		catch (e){
			try{
				objRequest=new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e){}
		}
	}
	if (typeof call_back_function == "undefined") {
		objRequest.open ("GET", URL+"?"+str, false);	
		objRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
		objRequest.send (str);
		return objRequest.responseXML;
	}
	else {
		objRequest.onreadystatechange = call_back_process;
		objRequest.open ("GET", URL+"?"+str, true);
	}	
}

function call_back_process() {
	if (objRequest.readyState == 4) {
		return objRequest.responseText;
	}
}