window.addEvent('domready', function() {
							  

	var captureHTML = "";						  
	var randomnumber=Math.floor(Math.random()*6);
	var status = { 0: 'tgb', 1: 'vfr', 2: 'sge', 3: 'ygf', 4: 'ijn', 5: 'ofy' };
	var status2 = { 0: 'TGB', 1: 'VFR', 2: 'SGE', 3: 'YGF', 4: 'IJN', 5: 'OFY' };
		
	
	
	function capture_validate() {
		
		if($('capture_data').value==status[randomnumber] || $('capture_data').value==status2[randomnumber]){
			$('submit').disabled = false;
			$('submit').removeClass('disabled');
		}
		
	}
		
	captureHTML += "Please type in the four letters from the image below - all letters, not case sensitive.";
	captureHTML += "<br />";
	captureHTML += "<br />";
	captureHTML += "<input autocomplete='off' id='capture_data'  type='text' name='capture' size='4' style='float:left' /> ";
	captureHTML += "<img style='margin-top:-9px;' src='capture/images/"+randomnumber+".jpg' >"
	
	
	$('capture').set('html', captureHTML);
	
	$('capture_data').addEvent('keypress', capture_validate);
	
	$('submit').disabled = true;
	$('submit').addClass('disabled');
	
	

});