access javascript variable in page load event c# -

i setting session variable in page1.aspx inside document.ready

sessionstorage.setitem('prepayamt', 'some value stored'); 

now want value in page2.aspx page load event

protected void page_load(object sender, eventargs e) {      // value here } 

i have declared script section in page2.aspx able value

<script type="text/javascript">     $(document).ready(function () {         var pre_pay = sessionstorage.getitem('prepayamt');         alert(pre_pay);     }); </script> 

i have got 1 hidden variable in page2.aspx as

<asp:hiddenfield runat="server" id="hdnprepayamt" /> 

you correct try , set hidden value gets posted back, if use sever-side asp.net hiddenfield (i.e. asp:hiddenfield) need specify clientid="hdnprepayamt" setting , not id=

e.g.

<asp:hiddenfield runat="server" clientid="hdnprepayamt" /> 

as

<asp:hiddenfield runat="server" id="hdnprepayamt" /> 

will generate own client-side id field.

if view page source in browser see going on