page1.mp: <form action=page2.mp method=post> <input name=input1 type=text> <input type=submit> </form>

page2.mp: <form name=myform action=page3.mp method=post> <input type=hidden name=input1 value='[=req.getParameter("input1")]'> </form> <a href="javascript:document.forms["myform"].submit();">click here</a>