function ReloadCaptcha(imgId)
{
	if(null == imgId) { return; }
	var captchaImg = document.getElementById(imgId);
	if(null == captchaImg) { return; }
	var oldSrc = captchaImg.src;
	var i = oldSrc.indexOf('&d=');
	var newSrc = oldSrc;
	if(-1 != i)
	{
		newSrc = newSrc.substring(0, i);
	}
	newSrc = newSrc + '&d=' + Math.random();
	captchaImg.src = newSrc;
}