function checkAgent(){ 
	//モバイル端末の判定
	var agent = navigator.userAgent;
	if( agent.search(/iPhone/) != -1 ){
		return "iphone";
	}else if( agent.search(/iPod/) != -1 ){
		return "ipod";		
	}else if( agent.search(/iPad/) != -1 ){
		return "ipad";
	}else if( agent.search(/Android/) != -1 ){
		return "android";
	}else{
		return "other";
	}
};