one way is to use sessions. this requires the user has cookies on.
another way is to uses hidden form variables, if you are useing a form in your result html for selecting the result to be displayed in the data field page use this way:
simply add
<input type=hidden name=variablename value=whateverithastobe>
and you can use this variable on the next page.
if you use a normal link use this method:
<a href="nexpage.php?variablename1=value&variable2=value2">