var xmlHttp

function showRegion(str)
{ 
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
{
alert ("Browser does not support HTTP Request")
return
} 
var url="/source/select_regions.php"
url=url+"?country_id="+str
url=url+"&sid="+Math.random()
xmlHttp.onreadystatechange=stateChangedRegion
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}

function stateChangedRegion() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{ 
document.getElementById("txtRegion").innerHTML=xmlHttp.responseText 
} 
} 

//----
function showMetro(str)
{ 
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
{
alert ("Browser does not support HTTP Request")
return
} 
var url="/source/select_metros.php"
url=url+"?region_id="+str
url=url+"&sid="+Math.random()
xmlHttp.onreadystatechange=stateChangedMetro
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}

function stateChangedMetro() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{ 
document.getElementById("txtMetro").innerHTML=xmlHttp.responseText 
} 
} 
//---

//----
function showLocation(str)
{ 
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
{
alert ("Browser does not support HTTP Request")
return
} 
var url="/source/select_locations.php"
url=url+"?metro_id="+str
url=url+"&sid="+Math.random()
xmlHttp.onreadystatechange=stateChangedLocation
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}

function stateChangedLocation() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{ 
document.getElementById("txtLocation").innerHTML=xmlHttp.responseText 
} 
} 
//---

function GetXmlHttpObject()
{ 
var objXMLHttp=null
if (window.XMLHttpRequest)
{
objXMLHttp=new XMLHttpRequest()
}
else if (window.ActiveXObject)
{
objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
}
return objXMLHttp
}