はい、わかりました
<script> function setvalue(values) { document.getElementById('posisi').value = values; } </script> <div> <table width="1023" height="248" border="1"> <tr> <td> <input type="button" onclick="setvalue(this.value);" value="A1.8" /> </td> </tr> </table> </div> <div class="popup_window_css" id="sample"> <table class="popup_window_css"> <tr class="popup_window_css"> <td class="popup_window_css"> <div class="popup_window_css_head"> <img src="images/close.gif" alt="" width="9" height="9" />Aksi</div> <div class="popup_window_css_body"> <div style="border: 1px solid #808080; padding: 6px; background: #FFFFFF;"> <form method="post" action=""> <table> <tr> <td>Werehouse</td> <tr> <td>Posisi</td> <td> <input type='text' name="p" id="posisi" /> </td> </tr> <tr> <td>Product ID</td> <td> <input type='text' name="id" /> </td> </tr> <tr> <td>Product Name</td> <td> <input type='text' name="nama" /> </td> </tr> <tr> <td>Production Date</td> <td> <input type='text' name="tgl" /> </td> </tr> <tr> <td colspan='2' align='right'> <input type='submit' value='Save'> <input type='reset' value='Reset' /> <input type='button' value='view' onclick=\ "window.location.href='#';\"/> </td> </tr> </table> </div> </div>
プレ>ここで確認できます http://jsfiddle.net/JLExZ/