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// JavaScript Document
// declare a global XMLHTTP Request object
var XmlHttpObj;
// create an instance of XMLHTTPRequest Object, varies with browser type, try for IE first then Mozilla
function CreateXmlHttpObj()
{
// try creating for IE (note: we don't know the user's browser type here, just attempting IE first.)
try
{
XmlHttpObj = new ActiveXObject("Msxml2.XMLHTTP");
}
catch(e)
{
try
{
XmlHttpObj = new ActiveXObject("Microsoft.XMLHTTP");
}
catch(oc)
{
XmlHttpObj = null;
}
}
// if unable to create using IE specific code then try creating for Mozilla (FireFox)
if(!XmlHttpObj && typeof XMLHttpRequest != "undefined")
{
XmlHttpObj = new XMLHttpRequest();
}
}
// called from onChange or onClick event of the continent dropdown list
function ContinentListOnChange()
{
var continentList = document.getElementById("StateID");
var continentstate = document.getElementById("CountyID");
// get selected continent from dropdown list
var selectedContinent = continentList.options[continentList.selectedIndex].value;
var selectedstate = continentstate.options[continentstate.selectedIndex].value;
// url of page that will send xml data back to client browser
var requestUrl;
// use the following line if using asp
//requestUrl = "xml_data_provider.asp" + "?filter=" + encodeURIComponent(selectedContinent);
// use the following line if using php
requestUrl = "http://askthelawyers.com/skins/default/includes/xml_data.php" + "?state=" + encodeURIComponent(selectedContinent)+"&county="+ encodeURIComponent(selectedstate);
//alert(requestUrl);
CreateXmlHttpObj();
// verify XmlHttpObj variable was successfully initialized
if(XmlHttpObj)
{
// assign the StateChangeHandler function ( defined below in this file)
// to be called when the state of the XmlHttpObj changes
// receiving data back from the server is one such change
XmlHttpObj.onreadystatechange = StateChangeHandler;
// define the iteraction with the server -- true for as asynchronous.
XmlHttpObj.open("GET",requestUrl,true);
// send request to server, null arg when using "GET"
XmlHttpObj.send(null);
}
}
// this function called when state of XmlHttpObj changes
// we're interested in the state that indicates data has been
// received from the server
function StateChangeHandler()
{
// state ==4 indicates receiving response data from server is completed
if(XmlHttpObj.readyState == 4)
{
// To make sure valid response is received from the server, 200 means response received is OK
if(XmlHttpObj.status == 200)
{
PopulateState(XmlHttpObj.responseXML.documentElement);
PopulateCity(XmlHttpObj.responseXML.documentElement);
//PopulateLevel(XmlHttpObj.responseXML.documentElement);
}
else
{
alert("problem retrieving data from the server, status code: " + XmlHttpObj.status);
//Populateregion(XmlHttpObj.responseXML.documentElement);
}
}
}
// populate the contents of the Homegym dropdown list
function PopulateState(countryNode)
{
var region = document.getElementById("CountyID");
// clear the Focus list
for (var count = region.options.length-1; count >-1; count--)
{
region.options[count] = null;
}
var countryNodes = countryNode.getElementsByTagName("CountyID");
var idValue;
var textValue;
var optionItem;
// populate the dropdown list with data from the xml doc
for (var count = 0; count < countryNodes.length; count++)
{
textValue = GetInnerText(countryNodes[count]);
idValue = countryNodes[count].getAttribute("id");
optionItem = new Option( textValue, idValue, false, false);
region.options[region.length] = optionItem;
}
}
// populate the contents of the Homegym dropdown list
function PopulateCity(countryNode)
{
var region = document.getElementById("CityID");
// clear the Focus list
for (var count = region.options.length-1; count >-1; count--)
{
region.options[count] = null;
}
var countryNodes = countryNode.getElementsByTagName("CityID");
var idValue;
var textValue;
var optionItem;
// populate the dropdown list with data from the xml doc
for (var count = 0; count < countryNodes.length; count++)
{
textValue = GetInnerText(countryNodes[count]);
idValue = countryNodes[count].getAttribute("id");
optionItem = new Option( textValue, idValue, false, false);
region.options[region.length] = optionItem;
}
}
// returns the node text value
function GetInnerText (node)
{
return (node.textContent || node.innerText || node.text) ;
}