var devIpod="ipod";
var devIphone="iphone";
var devIpad = "ipad";
var devAndroid = "android";
var devBlackBerry = "blackberry;"

function DetectIpod(uagent){
	if(uagent.search(devIpod) > -1) return true;
	else return false;
}

function DetectIphone(uagent){
	if(uagent.search(devIphone) > -1) return true;
	else return false;
}

function DetectIpad(uagent){
	if(uagent.search(devIpad) > -1) return true;
	else return false;
}

function DetectAndroid(uagent){
	if(uagent.search(devAndroid) > -1) return true;
	else return false;
}

function DetectBlackBerry(uagent){
	if(uagent.search(devBlackBerry) > -1) return true;
	else return false;
}	

function DetectHandHeld(){
	var uagent = navigator.userAgent.toLowerCase();
	if(DetectIphone(uagent) || DetectIpad(uagent) || DetectIpod(uagent) || DetectAndroid(uagent) || DetectBlackBerry(uagent))
		return true;
	else 
		return false;
}