var contact_form = false;
var contact_form_valid = false;

// AJAX (HttpRequest) Object.
function AJAX(){
  if (window.XMLHttpRequest){
    return new XMLHttpRequest();
  } else if (window.ActiveXObject){
    return new ActiveXObject("Msxml2.XMLHTTP");
  }
}

function calendarSwitch(year,month){  
	var ajax = AJAX();
	ajax.onreadystatechange = function(){
		if((ajax.readyState == 4) && (ajax.status == 200)){
			var response = ajax.responseText;
			try{
				putHTML('calendar_container',response);
			} catch(e){
				
			}
		}    
	};	
	ajax.open('POST','ajax/',true);
	ajax.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	var parameters = 'mode=calendar&year=' + year + '&month=' + month + '&nocache=' + Math.random();
	ajax.send(parameters);
}

function submitContactForm(){
	contact_form.submit();
}

function validateContactForm(){
	contact_form = document.getElementById('contact_form');
	if(contact_form_valid) return true;
	code = document.getElementById('captcha_code').value;
	var ajax = AJAX();
	ajax.onreadystatechange = function(){
		if((ajax.readyState == 4) && (ajax.status == 200)){
			var response = ajax.responseText;
			try{
				if(response == 1){
					if(document.getElementById('name').value == ''){
						alert('Name cannot be blank.');
						return false;
					}
					if(document.getElementById('address').value == ''){
						alert('Address cannot be blank.');
						return false;
					}
					if(document.getElementById('subject').value == ''){
						alert('Subject cannot be blank.');
						return false;
					}
					if(document.getElementById('message').value == ''){
						alert('Message cannot be blank.');
						return false;
					}
					contact_form_valid = true;
					setTimeout(function(){submitContactForm();},500);
				} else {
					alert('CAPTCHA code is not correct.');
					getNewCaptcha(document.getElementById('captcha_display'));
					return false;
				}
			} catch(e){
				
			}
		}    
	};
	ajax.open('POST','ajax/',true);
	ajax.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	var parameters = 'mode=verify_captcha&code=' + code + '&nocache=' + Math.random();
	ajax.send(parameters);
	return false; // Don't submit form until validation happens after the AJAX response.
}