function r() {
	s = new String('abcdefghijklmnopqrstuvwxyz0123456789');
	sid = "";
	for(i = 0; i < 6; i ++) {
		x = Math.ceil(Math.random() * 1000) % s.length;
		sid += s.substring(x, x + 1);
	}
	return sid;
}
function sc() {
	if(document.getElementById("sid").value == "") {
		cc();
		document.getElementById("captchadiv").style.display = "block";
	}
}
function cc() {
	ran = r();
	document.getElementById("captchaimage").src = "/akcms_captcha.php?sid=" + ran;
	document.getElementById("sid").value = ran;
}