var ajaxActive = false;
var captchas = new Array();

function captchaSubmit(id, outId, type, item, validationFunction) {
	if (!ajaxObject) {
		var ajaxScript = document.createElement('script');
		ajaxScript.setAttribute('type', 'text/javascript');
		ajaxScript.setAttribute('src', 'sys/js/ajax.js');
		document.getElementsByTagName('head').item(0).appendChild(ajaxScript);
	}
	if (ajaxObject == null)	document.write('Cannot init ajax handler. Update your browser or check your settings.');
	else if (document.getElementById(id)) {
		if (ajaxActive == false) {
			ajaxActive = true;
			if (!document.getElementById('captchaDiv_'+id)) {
				captchas[captchas.length] = "captchaSubmit('"+id+"', '"+outId+"', '"+type+"', '"+item+"', "+validationFunction+");";
				eval("var captchaDiv_"+id+" = document.createElement('div');");
				eval("captchaDiv_"+id+".setAttribute('id', 'captchaDiv_"+id+"');");
				eval("document.getElementById('"+id+"').appendChild(captchaDiv_"+id+");");
			} else eval("var captchaDiv_"+id+" = document.getElementById('captchaDiv_"+id+"');");
			ajaxObject.open('GET', 'sys/misc/captcha.php', true);
			ajaxObject.onreadystatechange = function () {
				if (this.readyState == 4) {
					eval("captchaDiv_"+id+".innerHTML=this.responseText;");
					var form = document.getElementById(id);
					document.getElementById(id).onsubmit = function () {
						if (typeof(validationFunction) == 'function' && validationFunction()) return false;
						postVars = getPostVars(form); 
						eval("var writtenCaptcha = captchaDiv_"+id+".childNodes.item(0).childNodes.item(3).value;"); 						setTimeout("updateCaptchas();", 2500);
						return httpGetFile('', outId, 'POST', postVars+'ajaxRequestedType='+type+'&ajaxRequestedItem='+item);
					}
					ajaxActive = false;
				}
			}
			ajaxObject.send(null);
		} else {
			setTimeout("captchaSubmit('"+id+"', '"+outId+"', '"+type+"', '"+item+"', "+validationFunction+");", 100);
		}
	}
}

function updateCaptchas() {
	for (var i = 0; i<captchas.length; i++) {
		eval(captchas[i]);
	}
}

function getPostVars(form) {
	var postVars = '';
	if (form.hasChildNodes()) {
		for (var i=0; i<form.childNodes.length;i++) {
			postVars+=getPostVars(form.childNodes.item(i));
			if (form.childNodes.item(i).tagName == 'INPUT' || form.childNodes.item(i).tagName == 'SELECT' || form.childNodes.item(i).tagName == 'TEXTAREA') {
				if (form.childNodes.item(i).name) postVars+=form.childNodes.item(i).name+'='+form.childNodes.item(i).value+'&';
			}
		}
	}
	
	return postVars;
}