function ytp01aonMouse(targetnum){
	
	ytp01aonMouseOut();
	
	if(targetnum == "1"){
		document.getElementById('ytp01_a_01a').style.backgroundImage="url('./img/common/ytp01_a_01a_on.jpg')";
		document.getElementById('ytp01_a_01b').style.display="block";
	}
	else if(targetnum == "2"){
		document.getElementById('ytp01_a_02a').style.backgroundImage="url('./img/common/ytp01_a_02a_on.jpg')";
		document.getElementById('ytp01_a_02b').style.display="block";
	}
	else if(targetnum == "3"){
		document.getElementById('ytp01_a_03a').style.backgroundImage="url('./img/common/ytp01_a_03a_on.jpg')";
		document.getElementById('ytp01_a_03b').style.display="block";
	}
}

function ytp01aonMouseOut(){
	document.getElementById('ytp01_a_01a').style.backgroundImage="url('./img/common/ytp01_a_01a.jpg')";
	document.getElementById('ytp01_a_01b').style.display="none";
	document.getElementById('ytp01_a_02a').style.backgroundImage="url('./img/common/ytp01_a_02a.jpg')";
	document.getElementById('ytp01_a_02b').style.display="none";
	document.getElementById('ytp01_a_03a').style.backgroundImage="url('./img/common/ytp01_a_03a.jpg')";
	document.getElementById('ytp01_a_03b').style.display="none";
}