// fairly obvious what this does... code comments ommited on purpose
function SecureForm(form_name) {
	var rnumber = 1 + Math.floor(Math.random() * 20);
	var form = eval('document.' + form_name)
	form.sec_image.value = rnumber;
	document.write('<img src="/images/security/cimg' + rnumber + '.jpg" alt="Can\'t see this? Refresh the page!" title="Can\'t see this? Refresh the page!" width="150" height="50" style="margin: 5px 0px;" />');
}