function dis_chg(a){
 if(a==1){
    var objinput1 = document.getElementById('biz').style;
		objinput1.display="block";
	var objinput2 = document.getElementById('opening').style;
		objinput2.display="none";
}else if(a==2){
    var objinput1 = document.getElementById('biz').style;
		objinput1.display="none";
	var objinput2 = document.getElementById('opening').style;
		objinput2.display="block";
}
}