function isIE(versionNumber) {
	var detect = navigator.userAgent.toLowerCase();
	if(!(navigator && navigator.userAgent && navigator.userAgent.toLowerCase)) {
		return false;
	} else {
		if(detect.indexOf('msie') + 1) {
			// browser is internet explorer
			var ver = function() {
				// http://msdn.microsoft.com/workshop/author/dhtml/overview/browserdetection.asp
				// 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;
			};
			var valid = true;
			// if the version can be found and the version is less than our version number it is invalid
			if ((ver > -1) && (ver < versionNumber)) {
				valid = false;
			}
			return valid;
		} else {
			return false
		}
	}
}
function expandIntro(){
	document.getElementById('intro-swf').style.width='668px';
}
function collapseIntro(){
	document.getElementById('intro-swf').style.width='230px';
}