//get Root site URL address : "http://beta/stip"
var arrHeaderImg = new Array('/images/rotate/img_01.jpg','/images/rotate/img_02.jpg','/images/rotate/img_03.jpg','/images/rotate/img_04.jpg','/images/rotate/img_05.jpg','/images/rotate/img_06.jpg','/images/rotate/img_07.jpg','/images/rotate/img_08.jpg','/images/rotate/img_09.jpg','/images/rotate/img_10.jpg','/images/rotate/img_11.jpg','/images/rotate/img_12.jpg','/images/rotate/img_13.jpg');

function getRootURL()
{

//alert('protocol:['+window.location.protocol+']\nhostname:['+window.location.hostname+']\nport:['+location.port+']');

	var tmpStr, oBase;
	oBase = window.document.getElementsByTagName('BASE')[0];
	if(oBase)
	{
		tmpStr = oBase.getAttribute('root');
		if(tmpStr)
			if(tmpStr.length > 7)
			{
				//if(tmpStr.substr(tmpStr.length-1,1) == "/") tmpStr = tmpStr.substr(0,tmpStr.length-1);
				return tmpStr;
			}
	}

	var vProtocol = window.location.protocol;
	var vHostname = window.location.hostname;
	var vPort = window.location.port;

	if (0 < vPort.length) tmpStr = vProtocol + "//" + vHostname + ":" + vPort + "/";
	else tmpStr = vProtocol + "//" + vHostname + "/";

//alert(window.document.base.href);
	return tmpStr;
}

//get Last Folder URL address : "http://beta/stip/qaz"
function getCurrentFolderURL()
{
	var tmpStr = window.location.href.toLowerCase();
	var posX = tmpStr.lastIndexOf("/");
	if (6 == posX || 7 == posX)//http:// || https://
	{
		tmpStr = getRootURL();
	}
	else
	{
		tmpStr = tmpStr.substr(0,posX)
	}
	return tmpStr;
}


function changeHeaderImg(tdId,arrImg)
{
//random change background image of HEADER IMAGE cell >> TD
	if(!tdId) return;
	if(!arrImg) return;
	if(1 > tdId.length) return;
	if(1 > arrImg.length) return;
	var oTd = document.getElementById(tdId);
	if(!oTd) return;
	
	//((Max - Min + 1) * RND)+ Min)
	var x = arrImg.length * Math.random();
	x = x.toString();
	var posDot = x.indexOf(".");
	x = x.substr(0,posDot);
	oTd.style.backgroundImage = "url(" + getRootURL() + arrImg[x] + ")";
//alert(x + '\n' + oTd.background);
	setTimeout(function(){changeHeaderImg(tdId,arrImg)},1000*60*1);//1000*60*2
	//oTd.background = getRootURL() + arrImg[x];
//alert(x + '\n' + oTd.style.backgroundImage);
}