function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		introduction_over = newImage("images/introduction-over.jpg");
		news_over = newImage("images/news-over.jpg");
		three_phases_over = newImage("images/three_phases-over.jpg");
		enrollment_over = newImage("images/enrollment-over.jpg");
		school_access_over = newImage("images/school_access-over.jpg");
		about_us_over = newImage("images/about_us-over.jpg");
		download_over = newImage("images/download-over.jpg");
		userful_links_over = newImage("images/userful_links-over.jpg");
		contact_us_over = newImage("images/contact_us-over.jpg");
		preloadFlag = true;
	}
}


var mediaWindow

function openMediaWindow(fileName, w, h) {
	closeMediaWindow()
	w += 20
	h += 80
	var dim = 'HEIGHT=' + h + ',WIDTH=' + w + ',scrollbars=yes'
	mediaWindow = window.open(fileName, 'mediaWin', dim)
}

function closeMediaWindow() {
	if (mediaWindow && !mediaWindow.closed) mediaWindow.close()
}


var mainContent;
var lang, oppoLang;

function init() {
	defineRegion();
}


function switchLang() {
	var iext, idir, ext, isHTML;
	defineRegion();
	isHTML = (mainContent.lastIndexOf('.htm') != -1);
	if (isHTML) {
		iext = mainContent.lastIndexOf(lang + '.htm');
		ext = mainContent.substring(iext+2, mainContent.length);
		idir = mainContent.lastIndexOf("/");
		sub = mainContent.substring(idir, iext);
		newLoc = mainContent.substring(0, idir) + sub + oppoLang + ext;
		self.location = newLoc;
	} else {
		self.location = 'index.html';

	}

}

function defineRegion() {
	mainContent = self.location.toString();
	lang = (mainContent.indexOf("_e.") != -1) ? '_e' : '_c';
	oppoLang = (lang == '_e')? '_c' : '_e';
}