// JavaScript Document
function changebox(id){
	for(var i=1; i<=4; i++){
		var objBtn = getObj("faqbtn" + i);
		var objCon = getObj("faqcontent" + i);
		if(i == id){
			objBtn.className = "faqbtn_on";
			objCon.className = "";
		}else{
			objBtn.className = "faqbtn_off";
			objCon.className = "dn";
		}
	}
}

function getObj(objID){
	return document.getElementById(objID);
}