pass textbox values of one page to html template of another page

i have some textboxes.. when 'preview' button is clicked it goes to another page, preview.aspx which contains an html template.. i need to replace the textbox entered values inside the template.. how will i code it using asp.net? The html template is
preview.aspx .....
<table width="450" border="0" cellspacing="0" cellpadding="0" class="bg" bgcolor="red">                                         <tr>                                                                     &nbs ...