Retrieving Session Variable client side.

Currently, in my web application I have a listbox that gets populated client side (via java script) with a set of ids -- we'll call this page 1. Server side, I am populating a variable with the ids and passing it through a query string to another page -- we'll call it page 2. Now, I have a previous button on page2 which allows me to go to page 1. I'm trying to figure out how to repopulate the listbox on page 1 with the values previously selected. I was thinking of just storing the set of ids in a session variable and using it client side to repopulate the list box. Can anyone advise on how to access a session variable client side?

Here's some snippets of my code...
- ASP page

Code:

---


// function that calls the function that populates the listbox
function CopyItem(plyrDuplicate) {
    var plyrDuplicate = (typeof plyrDuplicate == "undefined")?'defaultValue':plyrDuplicate;
    var firstListBox = document.getElementById('<%= lstPlayerSelect.ClientID %>');
    var secondListBox = document.getElementById('<%= lstPlayerQueue.ClientID %>');
    for (var i = 0; i < firstListBox.options.length; i++)
        {
        if (firstListBox.options[i].selected) {
            var newOption = document.createElement("option");
            newOption.text = firstListBox.options[i].text;
            newOption.value = firstListBox.options[i].value;
            playerVal = newOption.value;
            CheckDuplicate(playerVal);
            var printRec =  CheckDuplicate(playerVal);
          // alert(playerVal);
          //alert(CheckDuplicate(playerVal));
            if (printRec != true) {
            secondListBox.options[secondListBox.options.length] = newOption;
            }
        }       
    }
    if (document.getElementById('ErrorMsg').style.display = 'inherit') {
        document.getElementById('ErrorMsg').style.display = 'none';
    }
    Updatelist();
    return false;
}

//Function that actually populates the listbox
function Updatelist()
{
    var objPlyrQue = document.getElementById('<%= lstPlayerQueue.ClientID %>');
    var objHidden  = document.getElementById('<%= hdnPlyrLst.ClientID %>');
    objHidden.value = "";
   
    var listLength = objPlyrQue.options.length;
    for (var i = 0; i < listLength; i++)
    {
      objHidden.value = objHidden.value + objPlyrQue.options[i].value;
      if (i != listLength-1)
      {
      objHidden.value = objHidden.value + ', ';
      }
    //alert(objHidden.value);
    }
}

---

-- code behind for "Page 1"

Code:

---

'Builds and passes Query String
    Protected Sub btnNext_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnNext.Click

        Dim iFileType As String
        Dim iSeason As Integer
        Dim TeamStats As String
        Dim PlayerID As String
        Dim FileTypeTxt As String
        Dim iSeasonID As Integer

        PlayerID = hdnPlyrLst.Value
        iSeason = Request.QueryString("pSeason")
        iSeasonID = Request.QueryString("pSeasonID")
        TeamStats = Request.QueryString("pTeamStats")
        iFileType = Request.QueryString("pFileType")
        FileTypeTxt = Request.QueryString("pFileTypeTxt")

        Response.Redirect("send_file.aspx?pPlayerID=" & PlayerID & "&pSeasonID=" & iSeasonID & "&pSeason=" & iSeason & "&pTeamStats=" & TeamStats & "&pFileType=" & iFileType & "&pFileTypeTxt=" & FileTypeTxt)

    End Sub

---

-- code behind for "page2"

Code:

---

'Code behind for previous buton
    Protected Sub btnPrevious_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnPrevious.Click
        'Declare Variable
        Dim pPlayerId As String
        Dim PlayerID As String

        'Initialize Variables
        PlayerID = Request.QueryString("pPlayerID")
        pPlayerId = String.Concat("", PlayerID, "")

        'If pPlayerId <> "" Then
        Session("playerId") = pPlayerId
        Response.Redirect(prevPage)
        'Else
        'Response.Redirect("prevPage?pPlayerID=" & pPlayerId)
        'End If
    End Sub

---

Session("variable") is a server side object, you can pass the data within from the server to the client in several different ways but I'm not sure that is what you are really looking to do.?

I'm trying to retrieve the values originally stored in hdnPlyrLst.Value when I return to "page1". So, i initially populate hdnPlyrLst.Value, go to "page2", then I return back to "page1". Well, i'd like to retrieve the original values of hdnPlyrLst.Value when I return to "page1".

If those are the values you are passing to page 2 you could just pass them back again or pass them up to the server when you leave the page and back when the page reloads. Or you could store them on the client side if the client machine allows it.