Sending value from one php page to another using Ajax

[anp24]

hello,
I am trying to send values from one php page to another. I am getting the value in "ResponseText" , but when the next page is displayed , the value of the parameter specifically "fm" is not displayed on that php page.

Following is the code in "start.php" that I have written

<script language="javascript">

var httpObject=null;

function getXmlHttpObject(url,parameters)
{

   try
    {
    // Firefox, Opera 8.0+, Safari
    httpObject=new XMLHttpRequest();
    }
   catch (e)
    {
        //Internet Explorer
    try
     {

        httpObject=new ActiveXObject("Msxml2.XMLHTTP.4.0");
     }
       catch (e)
       {

        httpObject=new ActiveXObject("Microsoft.XMLHTTP");
       }
    }

if (httpObject != null)
{
 httpObject.open("POST", url , true);

 httpObject.onreadystatechange=function setOutput()
 {
 alert(httpObject.readyState);
 if(httpObject.readyState == 4)
{
if (httpObject.status==200)
{
 alert(httpObject.responseText);
 }
}

 }

 httpObject.setRequestHeader("Content-Type","application/x-www-form-urlencoded");

 httpObject.setRequestHeader("Content-length", parameters.length);

 httpObject.setRequestHeader("Connection", "close");

  alert(parameters);

 httpObject.send(parameters);

}
else
{
alert('Giving up  Cannot create an XMLHTTP instance');
 return false;

   }


}

function ajax_check(obj)
{

var poststr="fm="+encodeURIComponent(document.getElementById("frommail").value)+"&cardto="+encodeURIComponent(document.getElementById("cardto").value)+"&greet="+encodeURIComponent(document.getElementById("greet").value)+"&mesg="+encodeURIComponent(document.getElementById("mesg").value)+"&send="+encodeURIComponent(document.getElementById("send").value)+"&Daycurrent="+encodeURIComponent(document.getElementById("Daycurrent").value)+"&Monthcurrent="+encodeURIComponent(document.getElementById("Monthcurrent").value)+"&Yearcurrent="+encodeURIComponent(document.getElementById("Yearcurrent").value)+"&previewbutt="+encodeURIComponent(document.getElementById("previewbutt").value)+"&tomail="+encodeURIComponent(document.getElementById("tomail").value)+"&Day="+encodeURIComponent(document.getElementById("Day").value)+"&Month="+encodeURIComponent(document.getElementById("Month").value)+"&Year="+encodeURIComponent(document.getElementById("Year").value);

 getXmlHttpObject("privew.php",poststr);

</script>


<script language="javascript">
function chk_empty(form1)
{
var flag=0;
var cnt=0;


if(document.form1.send[1].checked=='true')
    {
if((document.form1.Day.selectedIndex==0)||(document.form1.Month.selectedIndex==0)||(document.form1.Year.selectedIndex==0))
	{
	  alert ("You have not selected the date.");
	  return false;
	}
    }

}

</script>





following is the coding of the form




<form name="form1" method="post" action="privew.php" onSubmit="return chk_empty(form1)"  >


  <input type=submit name=previewbutt value=Preview onClick="ajax_check(this.parentNode)" class="buttons">

</form>

what should I do so that I can get the value of parameter sent through AJAX

Thank you