var xmlHttp;
var id;

function showDialect(str){
id = "txtResult";
var url="AJAX/dialect.php?type=" + str;
xmlHttp=GetXmlHttpObject(stateChanged);
xmlHttp.open("GET", url , true);
xmlHttp.send(null);  
}

function showProject(str,purpose){
id = "txtProject";
var url="AJAX/project.php?type=" + str + "&purpose=" + purpose ;
xmlHttp=GetXmlHttpObject(stateChanged);
xmlHttp.open("GET", url , true);
xmlHttp.send(null); 
}

function showArea(str){
id = "txtArea";
var url="AJAX/area.php?type=" + str;
xmlHttp=GetXmlHttpObject(stateChanged);
xmlHttp.open("GET", url , true);
xmlHttp.send(null); 
}

function showType(str,purpose){
purpose=document.getElementById('purpose').value;
id = "txtType";
var url="AJAX/type.php?type=" + str + "&purpose=" + purpose ;
xmlHttp=GetXmlHttpObject(stateChanged);
xmlHttp.open("GET", url , true);
xmlHttp.send(null);  
}
 

function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{ 
document.getElementById(id).innerHTML=xmlHttp.responseText ;
}
} 

function GetXmlHttpObject(handler){ 

var objXmlHttp=null;
if (navigator.userAgent.indexOf("Opera")>=0)
{
alert("This example doesn't work in Opera") ;
return ;
}

if (navigator.userAgent.indexOf("MSIE")>=0)
{ 
var strName="Msxml2.XMLHTTP";
if (navigator.appVersion.indexOf("MSIE 5.5")>=0)
{
strName="Microsoft.XMLHTTP";
} 
try
{ 
objXmlHttp=new ActiveXObject(strName);
objXmlHttp.onreadystatechange=handler ;
return objXmlHttp;
} 
catch(e)
{ 
alert("Error. Scripting for ActiveX might be disabled");
return;
} 
} 
if (navigator.userAgent.indexOf("Mozilla")>=0)
{
objXmlHttp=new XMLHttpRequest();
objXmlHttp.onload=handler;
objXmlHttp.onerror=handler;
return objXmlHttp;
}
}