function reg(){
	document.getElementById("myform").style.display="block";
	document.getElementById("loginfrm").style.display="none";
	document.getElementById("bt_reg").className="btn1";
	document.getElementById("bt_login").className="btn02";
}
function login(){
	document.getElementById("myform").style.display="none";
	document.getElementById("loginfrm").style.display="block";
	document.getElementById("bt_reg").className="btn01";
	document.getElementById("bt_login").className="btn2";

}

function showtab(id,allNum,divName,menuName){
	for (var i=1;i<=allNum;i++){
		if (i==id){
			document.getElementById(divName+i).style.display="block";
			document.getElementById(menuName+i).className="bt1";
		}else{
			document.getElementById(divName+i).style.display="none";
			document.getElementById(menuName+i).className="bt2";
		}
	}
}