var xmlHttp

function fetch(str)
{ 
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url="url.php";
url=url+"?q="+str;
document.getElementById("city").innerHTML="Please wait...";
xmlHttp.onreadystatechange=function()
{ 
if (xmlHttp.readyState==4)
{ 
document.getElementById("city").innerHTML=xmlHttp.responseText;
}
}
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}



function GetXmlHttpObject()
{
var xmlHttp;
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;
}

function get(str)
{ 
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url="http.php";
url=url+"?g="+str;
document.getElementById("school").innerHTML="Please wait...";
xmlHttp.onreadystatechange=function()
{ 
if (xmlHttp.readyState==4)
{ 
document.getElementById("school").innerHTML=xmlHttp.responseText;
}
}
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function htp(str)
{ 
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url="htp.php";
xmlHttp.onreadystatechange=function()
{ 
if (xmlHttp.readyState==4)
{ 
document.getElementById("college").innerHTML=xmlHttp.responseText;
}
}
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}