// holds an instance of XMLHttpRequest
var xmlHttp = createXmlHttpRequestObject();
// holds the remote server address 
var serverAddress = "validate.php";
// when set to true, display detailed error messages
var showErrors = true;
// initialize the validation requests cache 
var cache = new Array();

// creates an XMLHttpRequest instance
function createXmlHttpRequestObject() 
{
  // will store the reference to the XMLHttpRequest object
  var xmlHttp;
  // this should work for all browsers except IE6 and older
  try
  {
    // try to create XMLHttpRequest object
    xmlHttp = new XMLHttpRequest();
  }
  catch(e)
  {
    // assume IE6 or older
    var XmlHttpVersions = new Array("MSXML2.XMLHTTP.6.0",
                                    "MSXML2.XMLHTTP.5.0",
                                    "MSXML2.XMLHTTP.4.0",
                                    "MSXML2.XMLHTTP.3.0",
                                    "MSXML2.XMLHTTP",
                                    "Microsoft.XMLHTTP");
    // try every id until one works
    for (var i=0; i<XmlHttpVersions.length && !xmlHttp; i++) 
    {
      try 
      { 
        // try to create XMLHttpRequest object
        xmlHttp = new ActiveXObject(XmlHttpVersions[i]);
      } 
      catch (e) {} // ignore potential error
    }
  }
  // return the created object or display an error message
  if (!xmlHttp)
    displayError("Error creating the XMLHttpRequest object.");
  else 
    return xmlHttp;
}

// function that displays an error message
function displayError($message)
{
  // ignore errors if showErrors is false
  if (showErrors)
  {
    // turn error displaying Off
    showErrors = false;
    // display error message
 
    alert("Error encountered: \n" + $message);
    // retry validation after 10 seconds
    setTimeout("validate();", 10000);
  }
}

// the function handles the validation for any form field
function validate(inputValue, fieldID)
{
  //alert("validate:" + inputValue + "*****"+fieldID);
  // only continue if xmlHttp isn't void
  if (xmlHttp)
  {
    // if we received non-null parameters, we add them to cache in the
    // form of the query string to be sent to the server for validation
    if (fieldID)
    {
      //alert("validate - " + inputValue);
	  // encode values for safely adding them to an HTTP request query string
      inputValue = encodeURIComponent(inputValue);
      fieldID = encodeURIComponent(fieldID);
      // add the values to the queue
      cache.push("inputValue=" + inputValue + "&fieldID=" + fieldID);
    }
    // try to connect to the server
    try
    {
      // continue only if the XMLHttpRequest object isn't busy
      // and the cache is not empty
      if ((xmlHttp.readyState == 4 || xmlHttp.readyState == 0) 
         && cache.length > 0)
      {
        // get a new set of parameters from the cache
        var cacheEntry = cache.shift();
        // make a server request to validate the extracted data
        xmlHttp.open("POST", serverAddress, true);
        xmlHttp.setRequestHeader("Content-Type", 
                                 "application/x-www-form-urlencoded");
        xmlHttp.onreadystatechange = handleRequestStateChange;
        xmlHttp.send(cacheEntry);
      }
    }
    catch (e)
    {
      // display an error when failing to connect to the server
      displayError(e.toString());
    }
  }
}

// function that handles the HTTP response
function handleRequestStateChange() 
{
  // when readyState is 4, we read the server response
  if (xmlHttp.readyState == 4) 
  {
    // continue only if HTTP status is "OK"
    if (xmlHttp.status == 200) 
    {
      try
      {
        // read the response from the server
        readResponse();
      }
      catch(e)
 
      {
        // display error message
        displayError(e.toString());
      }
    }
    else
    {
      // display error message
      displayError(xmlHttp.statusText);
    }
  }
}

// read server's response 
function readResponse()
{
	// retrieve the server's response 
	var response = xmlHttp.responseText;
	// server error?
	if (response.indexOf("ERRNO") >= 0 
	  || response.indexOf("error:") >= 0
	  || response.length == 0)
	throw(response.length == 0 ? "Server error." : response);
	// get response in XML format (assume the response is valid XML)
	responseXml = xmlHttp.responseXML;
	// get the document element
	xmlDoc = responseXml.documentElement;
	result = xmlDoc.getElementsByTagName("result")[0].firstChild.data;
	fieldID = xmlDoc.getElementsByTagName("fieldid")[0].firstChild.data;
	// find the HTML element that displays the error
	message = document.getElementById(fieldID + "Failed");
	// show the error or hide the error
	//alert("validate:" + result);
	message.className = (result == "0") ? "error" : "hidden";
	// call validate() again, in case there are values left in the cache
	setTimeout("validate();", 500);
}


// sets focus on the first field of the form
function setFocus()    
{
  document.getElementById("selSalutation").focus();
}

function disableSubmitButton()    
{
	document.getElementById("submitButton").disabled = true;
}

function setActiveDiv(inputValue, fieldID)
{
	//alert("Input val: " + inputValue + "  Field: "+ fieldID);
	thisForm = document.getElementById("frmQuestionnaire");
	if (inputValue == "Individual")
	{
		thisDiv = document.getElementById("indInvestor");
		thisDiv.className = "visible";
		thisDiv = document.getElementById("instInvestor");
		thisDiv.className = "hidden";
		//thisDiv = document.getElementById("indInvestor2");
		//thisDiv.className = "visible";
		thisDiv = document.getElementById("instInvestor2");
		thisDiv.className = "hidden";
	}
	else
	{
		thisDiv = document.getElementById("instInvestor");
		thisDiv.className = "visible";
		thisDiv = document.getElementById("indInvestor");
		thisDiv.className = "hidden";
		thisDiv = document.getElementById("instInvestor2");
		thisDiv.className = "visible";
		//thisDiv = document.getElementById("indInvestor2");
		//thisDiv.className = "hidden";
	}

}

function setIndivInvOptions(fieldID)
{
	//alert("Field: "+ fieldID);
	if (fieldID == "chkIndNotApp")
	{
		if (document.getElementById("chkIndNotApp").checked == true)
		{
			document.getElementById("chkIndHighNetWorth").checked = false;
			document.getElementById("chkIndHighIncome").checked = false;

			document.getElementById("chkInstCharitableOrg").checked = false;
			document.getElementById("chInstPersonalTrust").checked = false;
			document.getElementById("chkInstEmployeeBenefit").checked = false;
			document.getElementById("chkInstBank").checked = false;
			document.getElementById("chkInstInvestors").checked = false;
			document.getElementById("chkInstNotApp").checked = false;
		}
	}
	else
	{
		if(document.getElementById("chkIndHighNetWorth").checked == true ||
			document.getElementById("chkIndHighIncome").checked == true)
		{
			document.getElementById("chkIndNotApp").checked = false;

			document.getElementById("chkInstCharitableOrg").checked = false;
			document.getElementById("chInstPersonalTrust").checked = false;
			document.getElementById("chkInstEmployeeBenefit").checked = false;
			document.getElementById("chkInstBank").checked = false;
			document.getElementById("chkInstInvestors").checked = false;
			document.getElementById("chkInstNotApp").checked = false;
		}
	}
}

function setInstInvOptions(fieldID)
{
	//alert("Field: " + fieldID);
	if (fieldID == "chkInstNotApp")
	{
		if (document.getElementById("chkInstNotApp").checked == true)
		{
			document.getElementById("chkInstCharitableOrg").checked = false;
			document.getElementById("chInstPersonalTrust").checked = false;
			document.getElementById("chkInstEmployeeBenefit").checked = false;
			document.getElementById("chkInstBank").checked = false;
			document.getElementById("chkInstInvestors").checked = false;

			document.getElementById("chkIndHighNetWorth").checked = false;
			document.getElementById("chkIndHighIncome").checked = false;
			document.getElementById("chkIndNotApp").checked = false;
		}
	}
	else
	{
		if(	document.getElementById("chkInstCharitableOrg").checked == true ||
			document.getElementById("chInstPersonalTrust").checked == true ||
			document.getElementById("chkInstEmployeeBenefit").checked == true ||
			document.getElementById("chkInstBank").checked == true ||
			document.getElementById("chkInstInvestors").checked == true)
		{
			document.getElementById("chkInstNotApp").checked = false;
			
			document.getElementById("chkIndHighNetWorth").checked = false;
			document.getElementById("chkIndHighIncome").checked = false;
			document.getElementById("chkIndNotApp").checked = false;
		}
	}
}

function checkTerms(fieldID)
{
	//alert("Field: "+ fieldID);
	if (fieldID == "chkAcceptTerms")
	{
		if (document.getElementById("chkAcceptTerms").checked == true)
			document.getElementById("submitButton").disabled = false;
		else
			document.getElementById("submitButton").disabled = true;
	}
}