function makeHttpRequest(url, callback_function, return_xml)
{	
   var http_request = false;
   document.form1.stdcode.value="";
   document.form1.stdcode1.value="";
   if (window.XMLHttpRequest) { // Mozilla, Safari,...
       http_request = new XMLHttpRequest();
       if (http_request.overrideMimeType) {
           http_request.overrideMimeType('text/xml');
       }

   } else if (window.ActiveXObject) { // IE
       try {
           http_request = new ActiveXObject("Msxml2.XMLHTTP");
       } catch (e) {
           try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
           } catch (e) {}
       }
   }

   if (!http_request) {
       alert('Browser doesn\'t support Ajax');
       return false;
   }
   http_request.onreadystatechange = function() {
       if (http_request.readyState == 4) {
           if (http_request.status == 200) {
               if (return_xml) {
                   eval(callback_function + '(http_request.responseXML)');
               } else {
                   eval(callback_function + '(http_request.responseText)');
               }
           } else {
               alert('There was a problem with the request.(Code: ' + http_request.status + ')');
           }
    }
   }
   http_request.open('GET', url, true);
   http_request.send(null);
}

function loadXML(xml)
{
   	  document.form1.loca.options.length=0;
	  document.form1.loca.options.length=xml.getElementsByTagName('record').length+1;
	  document.form1.loca.options[0].value='';
	  document.form1.loca.options[0].text='Choose ...';
	  var cnty = document.form1.cnty.value;
	  document.form1.cnty.value=cnty;
	  var code=xml.getElementsByTagName('Isd').item(0).firstChild.nodeValue;	
	  document.form1.isdcode.value=code;
	  document.form1.isdcode1.value=code;
	  document.form1.isdcode2.value=code;
	  for(i=0;i< xml.getElementsByTagName('record').length;i++)
	  {
		var record=xml.getElementsByTagName('record').item(i);	
		document.form1.loca.options[i+1].value=record.getElementsByTagName('Lvalue').item(0).firstChild.data;
		document.form1.loca.options[i+1].text=record.getElementsByTagName('Lname').item(0).firstChild.data;
	  }
	  	  
    try {
        clearTimeout(to);
    } catch (e) {}
    //to = setTimeout("nextPhrase()", parseInt(reload_after));
}
function stdXML(xml)
{
	  var loca = document.form1.loca.value;
	  var tcode=xml.getElementsByTagName('Std').item(0).firstChild.nodeValue;	 
	  document.form1.stdcode.value=tcode;
	  document.form1.stdcode1.value=tcode;
	try {
        clearTimeout(to);
    } catch (e) {}
    //to = setTimeout("nextPhrase()", parseInt(reload_after));
}


function nextPhrase()
{    
    var cnty = document.form1.cnty.value;  
    var cnturl = 'ajaxServerSide.php?ts=' + cnty;
    makeHttpRequest(cnturl, 'loadXML', true);    
}

function next_std()
{
    var std = document.form1.loca.value;
	var stdurl = 'ajaxServerSide.php?st=' + std;
    makeHttpRequest(stdurl, 'stdXML', true);    
}