asp.net data between pages through scripts

Create a new WebForm1.aspx page, add a TextBox and a button control, and write the statement that registers the client script in the Page_Load of the page:
private void Page_Load (object sender, System.EventArgs e)
{
Place user code here to initialize page
if (! Page.isclientscriptblockregistered ("ClientScript"))
{
StringBuilder sbscript = new StringBuilder ();
Sbscript.append ("<script>");
Sbscript.append ("function Openwin () {");
Sbscript.append ("var str=window.showmodaldialog" (' webform2.aspx '), document. Form1.txtWndName.value) ");
Sbscript.append ("if (str!=null) document." Form1.txtwndname.value=str ");
Sbscript.append ("} </script>");
string script = Sbscript.tostring ();
RegisterClientScriptBlock ("ClientScript", script);
}
THIS.BTNOPEN.ATTRIBUTES.ADD ("OnClick", "Openwin ()");
}
Create a new webform2.aspx page, put in two frames:
<frameset rows= "0,*" >
<frame src= "About:blank"
<frame src= "Webform3.aspx" >
</frameset>
Create a new webform3.aspx page, and write down the statement in the Page_Load that registers the script:
private void Page_Load (object sender, System.EventArgs e)