function checkComment(aForm)
{
		// Disable the summit button
		aForm.submit.disabled = true;

		// validate empty field

		var nonoChars = "*|,\":<>[]{}`\';()&$#%";

		if (aForm.userName.value == "")
		{
				alert("The Username field can not be empty, please try again.");
				aForm.userName.focus();
				aForm.submit.disabled = false;
				return false;
		}

		if (aForm.userEmail.value == "")
		{
				alert("The Email field can not be empty, please try again.");
				aForm.userEmail.focus();
				aForm.submit.disabled = false;
				return false;
		}

		if (aForm.userEmail.value.indexOf("@") < 0)
		{
				alert("Invalid Email, please try again.");
				aForm.userEmail.focus();
				aForm.submit.disabled = false;
				return false;
		}

		if (aForm.userComment.value == "")
		{
				alert("The Comment field can not be empty, please try again.");
				aForm.userComment.focus();
				aForm.submit.disabled = false;
				return false;
		}

		return true;

} // end of checkChangePassword()