var imageArray = [
	['image1.bmp', 'GRTC'],
	['image2.bmp', '8F2H'],
	['image3.bmp', 'N9RZ'],
	['image4.bmp', 'SCA2'],
	['image5.bmp', 'UCQ4'],
	['image6.bmp', 'ZQEK'],
	['image7.bmp', 'VJ8W'],
	['image8.bmp', '73PS'],
	['image9.bmp', '9MTV'],
	['image10.bmp', 'YFF3'],
	['image11.bmp', 'M8KH'],
	['image12.bmp', 'RYCA'],
	['image13.bmp', 'T49K'],
	['image14.bmp', 'Q7XQ'],
	['image15.bmp', 'QZTB'],
	['image16.bmp', 'YZL7'],
	['image17.bmp', 'MRAV'],
	['image18.bmp', 'QZPU'],
	['image19.bmp', 'AJ7K'],
	['image20.bmp', '7CC4']
]

var IMAGEDIR = "images/CAPTCHA/";

function isValidEmail(email) {
    reg = /^([A-Za-z0-9])+([_.\-\\&][A-Za-z0-9]+)*\@([A-Za-z0-9])+([_.-][A-Za-z0-9]+)*\.([A-Za-z]{2,4})$/;
    if(reg.test(email) == false)
	return false;
    else
	return true;
}

function checkcode(f) {
    var i = f.sdx.value;
    if(f.code.value == imageArray[i][1])
	return true;
    else
	return false;
}