function createXMLHttp() {
	if (typeof XMLHttpRequest != 'undefined')
	return new XMLHttpRequest();
	else if (window.ActiveXObject) {
		var avers = ["Microsoft.XmlHttp", "MSXML2.XmlHttp",
		"MSXML2.XmlHttp.3.0", "MSXML2.XmlHttp.4.0",
		"MSXML2.XmlHttp.5.0"];
		for (var i = avers.length -1; i >= 0; i--) {
			try {
				httpObj = new ActiveXObject(avers[i]);
				return httpObj;
			} catch(e) {}
		}
	}
	throw new Error('XMLHttp (AJAX) not supported');
}

function addLoadEvent(func) {
    var oldonload = window.onload;
    if (typeof window.onload != 'function') {
        window.onload = func;
    } else {
        window.onload = function() {
            if (oldonload) {
                oldonload();
            }
            func();
        }
    }
}

addLoadEvent(function() {
	// this is supported by IE, Opera, Safari
	var encoding = this.document.charset;
	if (typeof(encoding) == "undefined") {
		// this is supported by Firefox
		var encoding = this.document.characterSet;
	}
	
	// let's check if we need to give a warning
	if (typeof(encoding) != 'undefined' && encoding.toLowerCase() != 'utf-8') {
		//alert('Your browser is not set to Unicode encoding.' + encoding);
		var message = '<p class="msg">Your browser is not set to Unicode encoding therefore this page may not be displayed properly in your browser. <br/>Internet Explorer: right mouse click anywhere on the page, then go to Encoding and click Unicode (UTF-8).<br/>Firefox: click View, Character Encoding and click Unicode (UTF-8)<br/><br/><img src="http://www.chinaexportfinance.com/images/encoding_warning_cn.gif" alt=""/></p>';
		var pageContent = document.getElementById('container');
		pageContent.innerHTML = message + pageContent.innerHTML;
		
		// log  the error
		var ajaxObj = createXMLHttp(); 
		var url = 'http://www.chinaexportfinance.com/_bad_encoding.php';
		ajaxObj.open("GET", url, true);
		ajaxObj.send(null);
	}
	//document.write(this.document.charset);
	//document.write(this.document.defaultCharset);
	//document.write(this.document.characterSet);
})