$(document).ready(function()
{
	var vc = ['CXv1492H','02XB91jD','4a7BC088','4Fe2B3A8','A13D199c','f9E2U426','v5E5D32Z',
			  'G07954bB','22c0B40E','065C5ACa','8k5F539p','w631cC2D','DaB9549B','44C880Ed',
			  'E647y0FQ','C3F668nK','FDw512D4'];
	var r = vc[genRandom(0, vc.length-1)];
	$('#refer').attr('src', '/images/vc_' + r + '.gif');
	$('#refer2').val(r.substring(r.lastIndexOf('_')));
	$('#refer3').blur(function()
	{
		$(this).val($.trim($(this).val()));
	});
});	

function genRandom (inf, sup)
{ 
	var n = sup - inf; 
	var a = Math.random() * n;
	a = Math.round(a); 
	return parseInt(inf) + a; 
}