[Zope-dev] Javascript variables Form element values and zope

Fri Oct 3 17:25:59 EDT 2003

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>I have this little form and I would like to know how to persuade dtml or
>python to access the javascript variables in the set_p function and the
>element values in the form "LOG".
>  
>
This is impossible as you put it. You realize that Javascript is totally 
client side, and that to Zope it is nothing more than extra bytes to 
shove out to your browser, right? Javascript can only manipulate the DOM 
within a browser, and Zope can only manipulate the contents of the page 
before it is sent to the browser.

>I'll be thankful for any assistance.
>
><html><head>
><script language="JAVASCRIPT">
>function set_p(a,b)
>{
>//
>// call a zsql script mylookup which returns a single value
>//
>  document.p.value=<dtml-call expr="mylookup(a,b)">
>//
>//alternatively
>//document.p.value=<dtml-call
>expr="mylookup(document.LOG.m.value,document.LOG.n.value)">
>//
>}
></script>
></head><body>
><form name="LOG">
><table>
><tr>
><td><input type=text name="m" value=""></td>
><td><input type=text name="n" value=""></td>
><td><input type=text name="p" value=""></td>
><td><input type=button  value="Update P"
>onclick=set_p(m.value,c.value)></td></tr></table>
></form></body></html>
>  
>
However, Zope can see the values of request parameters (from the form) 
once the form is submitted. If you, say, give the form an action of 
'someZopeObject' then the form will be submitted to that object and you 
will be able to access the values of m, n, and p as they were just 
before the form was sent.

             --jcc

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