function getUserAgent() {
	
	if (typeof(navigator) != "object" || !navigator.userAgent) {
		this.unknown = true;
		code = "other";
	} 
	else {
		var ua = navigator.userAgent;
		if(ua.indexOf("iPad") >= 0){
			code = "iPad";
		} else if (ua.indexOf("iPhone") >= 0 || ua.indexOf("iPod") >= 0 ) {
			code = "iPhone";
		} else {
			code = "other";
		}
	}
	
	return code;
		
}

var judgeCode = getUserAgent();