function getInternetExplorerVersion()
// Returns the version of Internet Explorer or a -1
// (indicating the use of another browser).
{
	var rv = -1; // Return value assumes failure
	if (navigator.appName == 'Microsoft Internet Explorer')
	{
	var ua = navigator.userAgent;
	var re  = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
	if (re.exec(ua) != null)
		rv = parseFloat( RegExp.$1 );
	}
	return rv;
}
function checkVersion()
{
	var msg = "You're not using Internet Explorer.";
	var ver = getInternetExplorerVersion();
	if ( ver > -1 )
	{
		if ( ver > 6.0 ) 
			document.write('<'+'link rel="stylesheet" href="layout/stylesheets/ie7.css" />');
		else
			document.write('<'+'link rel="stylesheet" href="layout/stylesheets/ie.css" />');
	} else {
		document.write('<'+'link rel="stylesheet" href="layout/stylesheets/other.css" />')
	}
}
checkVersion();