Ajax Script:
Script Name:ajaxfunctions.js

function createrequestobject()
{
var xmlhttp=false;
try
{
xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");
}
catch(e)
{
try
{
xmlhttp=new ActiveXobject("Microsoft.XMLHTTP");
}
catch(e)
{
xmlhttp=false;
}
}
if(!xmlhttp && typeof XMLHttpRequest != 'undefined')
{
xmlhttp=new XMLHttpRequset();

}
return xmlhttp;
}

function displaybookinfo(bk_id)
{
var request=createrequsetobject();
request.open('GET','action.php?&b_id='+bk_id,true);
request.onreadystatechange=function()
{
if(requset.readystate == 4)
{
if(request.status == 200)
{
var.response=requset.responseText;
document.getElementById('bookpanel').innerHTML=respose;
}

}
}
requset.send(null);
}