Hi there, I have a form in php where the user puts in a dienumber, number of peices,and the length of each cut. I need then to look up the weight of the die in a db then multiple that by the number of peices multiple the length, then output the answer in the kgs field, is this possible? Figured i would need the onChange and thus js. But my php is better than my js :S So far have this, think im nearly there(maybe?) Thanks echo '<script language="javascript">'; echo 'function Getweight(){'; echo 'peices = document.inputs.pieces.value;'; echo 'cutlength = document.inputs.cutlength.value;'; //need to look up weight of die //need to output back to doc.inputs.kgs echo '}'; echo '</script>'; echo '<FORM action="../update/updateOrdering.php" method="get" name="inputs">'; echo '<TD class="value"><INPUT type="text" name="dienumber" value="" maxlength="10" size="20"></TD>'; echo '<TD class="value"><INPUT type="text" name="pieces" value="2" maxlength="10" size="20"></TD>'; echo '<TD class="value"><INPUT type="text" name="cutlength" value="1" maxlength="10" size="20" onChange="Getweight()"></TD>'; echo '<TD class="value"><INPUT type="text" name="kgs" value="" maxlength="10" size="20"></TD>'; ..... select dieweight from die_tab where dienumb = 1234