/**
 *	Override captcha field with 'captcha_override'
 *	Validators should skip captcha validation when this field is set
 */
fireOn = Window.ie ? 'load' : 'domready';
window.addEvent(fireOn, function() {
	if(captchaField = $('captcha')){
		captchaField.innerHTML = '<input type="hidden" name="captcha_override" value="true" />';
	}
});