the javascript function can't be called when the page postback

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I am trying to call a javascript function as you can see here :

<script language="javascript" type="text/javascript">
        function postRefId(refIdValue) {
            var form = document.createElement("form");
            form.setAttribute("method", "POST");
            form.setAttribute("action", "<% System.Configuration.ConfigurationManager.AppSettings["PgwSite"].ToString(); %>");
            form.setAttribute("target", "_self");
            var hiddenField = document.createElement("input");
            hiddenField.setAttribute("name", "RefId");
            hiddenField.setAttribute("value", refIdValue);
            form.appendChild(hiddenField); document.getElementById("bankform").appendChild(form);
            form.submit();
            document.getElementById("bankform").removeChild(form);
        }
    </script>

I put the part of code inside contentplaceholder .as you can see the function expects refIdValue ,so i should generate this value in code behind and pass it to this function ,so i create a button to generate the refIdValue :

           Session.Add("post", "<script language='javascript' type='text/javascript'> postRefId('" + resultArray[1] + "');</script>");

In the html page i put this part of code .

   <%
            if (Session["post"] != null)
            {
                string ss = Session["post"].ToString();
                Response.Write(Session["post"].ToString());
            }
             %>

after calling the function the page should be redirected ,but the page is refreshed and noting happens ,.why ?

asked 27 secs ago

Mehrdad

46

the javascript function can't be called when the page postback