var o = window.onload;
var x, y;

window.onload = function() {

	build_captcha();
	
	if( typeof o == 'function' ) {
		o();
	}

}

function check_captcha( form ) {

	if( (x+y) == document.getElementById('a').value ) {
		var rtn = validate(form);
		if( rtn ) {
			document.getElementById('contact_form').action = '/scripts/contact_form/mail.php';
		}
		return rtn;
	}
	else {
		
		alert('Captcha validation failed. Please try again.');
		build_captcha();
		return false;
		
	}

}

function build_captcha() {

	x = Math.floor(Math.random()*10+1);
	y = Math.floor(Math.random()*10+1);
	
	document.getElementById('x').innerHTML = x;
	document.getElementById('y').innerHTML = y;
	
}