var xmlHttp

//START FUNCTION TO SHOW COUNTY TRAIL LIST
function showCountyTrailList(str)
{ 
xmlHttp=GetXmlHttpObject(str)
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request")
 return
 }
var url="trail_county_trail_list.php?string="+str+"&sid="+Math.random()
xmlHttp.onreadystatechange=stateChanged 
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}
//END SHOW COUNTY TRAIL LIST

//START FUNCTION TO SORT COUNTY TRAIL LIST
function trailListSort(str)
{ 
xmlHttp=GetXmlHttpObject(str)
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request")
 return
 }
var url="trail_county_trail_list.php?string="+str+"&sid="+Math.random()
xmlHttp.onreadystatechange=stateChanged 
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}
//END SORT COUNTY TRAIL LIST


//THIS FUNCTION FOR SHOW COUNTY TRAIL LIST RESPONSE
function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 document.getElementById("trailList").innerHTML=xmlHttp.responseText 
 } 
}


//CHECK BROWSER COMPATIBILITY WITH AJAX
function GetXmlHttpObject()
{
var xmlHttp=null;
try
 {
 // Firefox, Opera 8.0+, Safari
 xmlHttp=new XMLHttpRequest();
 }
catch (e)
 {
 //Internet Explorer
 try
  {
  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
  }
 catch (e)
  {
  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
 }
return xmlHttp;
} 
//END BROWSER COMPATIBILITY CHECK