function login_check(f) {
	if(f.mb_id.value == '') {
		f.mb_id.style.backgroundImage = '';
		f.mb_id.focus();
		alert('¾ÆÀ̵𸦠ÀÔ·ÂÇϼ¼¿ä.');
		return false;
	}

	if(f.mb_password.value == '') {
		f.mb_password.style.backgroundImage = '';
		f.mb_password.focus();
		alert('ºñ¹Ð¹øÈ£¸¦ ÀÔ·ÂÇϼ¼¿ä.');
		return false;
	}
}

function win_open(url, width, height) {
	window.open(url, 'win', "left=20, top=20, width="+width+", height="+height+",scrollbars=yes");
}