var w3clink = "<a href='http://www.w3.org/'>W3C</a>";
var firelink = "<a href='http://firefox.com/'>Firefox</a>";
var saflink = "<a href='http://www.apple.com/safari/'>Safari</a>";
var oplink = "<a href='http://www.opera.com/'>Opera</a>";
var ie7link = "<a href='http://www.microsoft.com/windows/downloads/ie/getitnow.mspx'>" +
	"newest version</a>";
function BrowserCheck()
{
	if (navigator.appVersion.indexOf("MSIE 6")>=0 ||
		navigator.appVersion.indexOf("MSIE 5")>=0 ||
		navigator.appVersion.indexOf("MSIE 4")>=0
		) 
	{
		var brow_alert = 
		"<div id='alert'>" + 
			"<h2> Your browser is not supported </h2>" +
			"<p> You are using an out-dated version of Internet Explorer.</p>" +
			"<p> You can still view most of these pages, but they will look ugly! </p>" +
			"<p> May we suggest that you update your browser to the  " +
			ie7link+ ". Or get an independent and "+w3clink+" standard" + 
			" compatible browser, e.g. " +firelink+", "+saflink+" or "+oplink+ ".</p>" +
			"<p> All browsers are free of charge. </p>" +
		"</div>";
		document.getElementById('browalert').innerHTML = brow_alert;
	}
	
/*	if (navigator.appVersion.indexOf("MSIE 7")>=0) 
	{
		var brow_alert = 
		"<div id='alert'>" + 
			"<h2> Your browser is IE7 </h2>" +
		"</div>";
		document.getElementById('browalert').innerHTML = brow_alert;
	} 
	if (navigator.userAgent.indexOf("Firefox")>=0) 
	{
		var brow_alert = 
		"<div id='alert'>" + 
			"<h2> Your browser is Firefox </h2>" +
		"</div>";
		document.getElementById('browalert').innerHTML = brow_alert;
	} */

}