var http_request_CheckAvailibilityForm= false;

function makePOSTRequestCheckAvailibilityForm(url, parameters) 
{
  http_request_CheckAvailibilityForm  = false;
  if (window.XMLHttpRequest) { // Mozilla, Safari,...
	 http_request_CheckAvailibilityForm  = new XMLHttpRequest();
	 if (http_request_CheckAvailibilityForm .overrideMimeType) {
		// set type accordingly to anticipated content type
		//http_request_CheckAvailibilityForm .overrideMimeType('text/xml');
		http_request_CheckAvailibilityForm .overrideMimeType('text/html');
	 }
  } else if (window.ActiveXObject) { // IE
	 try {
		http_request_CheckAvailibilityForm  = new ActiveXObject("Msxml2.XMLHTTP");
	 } catch (e) {
		try {
		   http_request_CheckAvailibilityForm  = new ActiveXObject("Microsoft.XMLHTTP");
		} catch (e) {}
	 }
  }
  if (!http_request_CheckAvailibilityForm ) {
	 alert('Cannot create XMLHTTP instance');
	 return false;
  }
  
  http_request_CheckAvailibilityForm .onreadystatechange = alertCheckAvailibilityForm;
  http_request_CheckAvailibilityForm .open('POST', url, true);
  http_request_CheckAvailibilityForm .setRequestHeader("Content-type", "application/x-www-form-urlencoded");
  http_request_CheckAvailibilityForm .setRequestHeader("Content-length", parameters.length);
  http_request_CheckAvailibilityForm .setRequestHeader("Connection", "close");
  http_request_CheckAvailibilityForm .send(parameters);
}

function alertCheckAvailibilityForm() 
{

  if (http_request_CheckAvailibilityForm .readyState == 4) 
  {
	 if (http_request_CheckAvailibilityForm .status == 200) 
	 {
		result = http_request_CheckAvailibilityForm .responseText;
		document.getElementById('check_availibility').innerHTML = result;            
	 }
	 else
	 {
		alert("Connection error");
	 }
  }
}

function getCheckAvailibilityForm(obj, errorMessage) 
{

  var err = false;
  if(Trim(document.getElementById("check_availibility_ref").value).length==0) err=true;
  if(Trim(document.getElementById("check_availibility_name").value).length==0) err=true;
  if(Trim(document.getElementById("check_availibility_surname").value).length==0) err=true;
  if(Trim(document.getElementById("check_availibility_email").value).length==0) err=true;
  if(Trim(document.getElementById("check_availibility_fromDate").value).length==0) err=true;
  if(Trim(document.getElementById("check_availibility_toDate").value).length==0) err=true;
  if(err)
  {
	  alert(errorMessage);
	  return;
  }
	
  var poststr = "check_availibility_ref=" + encodeURI(document.getElementById("check_availibility_ref").value) + 
				"&check_availibility_name=" + encodeURI(document.getElementById("check_availibility_name").value) + 
				"&check_availibility_surname=" + encodeURI(document.getElementById("check_availibility_surname").value)+
				"&check_availibility_email=" + encodeURI(document.getElementById("check_availibility_email").value)+
				"&check_availibility_fromDate=" + encodeURI(document.getElementById("check_availibility_fromDate").value)+
				"&check_availibility_toDate=" + encodeURI(document.getElementById("check_availibility_toDate").value);
				
  makePOSTRequestCheckAvailibilityForm('checkAvailibilityRent.php', poststr);
}