document.onload = randomString();

function randomString() {
	var chars = "23456789bcdfghjkmnpqrstvwxyz";
	var string_length = 6;
	var randomstring = '';
	for (var i=0; i<string_length; i++) {
		var rnum = Math.floor(Math.random() * chars.length);
		randomstring += chars.substring(rnum,rnum+1);
	}
	document.getElementById('security_code').value = randomstring;
	document.write("<img src='http://showtime.arkansasonline.com/e2/static/nwaonline/scripts/validation/CaptchaSecurityImages.php?code="+randomstring+"' class='captcha' />");
}



function checkCaptcha() {
	if(document.getElementById('security_code').value == document.getElementById('captcha').value) {
		document.getElementById('captcha_error').textContent = "Correct code!";
		document.getElementById('carrierForm').submit();
	} else {
		document.getElementById('captcha_error').textContent = "Invalid code!";
	}
}