var mobileDevices = new Array("iphone", "ipod", "series60", "symbian", "android", "windows ce", "blackberry", "palm");	

function isMobileUser()
{
	var uagent = navigator.userAgent.toLowerCase();	
	for (var dev in mobileDevices)
	{
		if (uagent.search(mobileDevices[dev]) > -1)
		{
			return true;
		}
	}
	return false;
}