// JavaScript Document


function bChange01(){
	document.getElementById("ad1").style.display = "block";
	document.getElementById("ad2").style.display = "none";
	document.getElementById("ad3").style.display = "none";	
	document.getElementById("ad4").style.display = "none";
}
function bChange02(){
	document.getElementById("ad1").style.display = "none";
	document.getElementById("ad2").style.display = "block";
	document.getElementById("ad3").style.display = "none";	
	document.getElementById("ad4").style.display = "none";
}
function bChange03(){
	document.getElementById("ad1").style.display = "none";
	document.getElementById("ad2").style.display = "none";
	document.getElementById("ad3").style.display = "block";	
	document.getElementById("ad4").style.display = "none";
}
function bChange04(){
	document.getElementById("ad1").style.display = "none";
	document.getElementById("ad2").style.display = "none";
	document.getElementById("ad3").style.display = "none";	
	document.getElementById("ad4").style.display = "block";
}