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HowTo Pass Javascript back into onclick value on ASP page

Last Modified: 2012-05-09
Working on logic for an ASP page.
I have a form (myForm) that I want to auto update fields as the user completes the form.

I have a radio button (myRadio) that successfully assigns a variable to a hidden field. (myTempField)
This is where i get 'fuzzy'
Then I have a javascript method (scrapeTempField) to handle variable assignment for a dropdown (Choose) selection.

for the onChange event for the dropdown, I want to grab the hidden field's value
assign it to a new javascript variable; append value with text (extraText)
and then pass that JavaScript variable
to a visible text field (myTarget) for the user to verify or modify by typing.
before pressing submit to write the combined string to a data source

Ive almost got it but missing the appending piece before forcing it into the textfield
(no server roundtrips please)

thanks for your help !

Response.Write "<form name='myForm' action=select.asp method=post>"
Response.Write "MyLabel:<input type='radio' value='MyRadioSelection' name='myRadio' id='myRadio' onClick=""document.forms[0].myTempField.value='"myValue"';""> &nbsp;&nbsp;"
Response.Write "<input type='hidden' name='myTempField' id='myTempField' value='' />"
<script type="text/javascript">
function scrapeTempField() {
jstemp = document.forms[0].temp.value;
// not sure about this block's logic
return jstemp;
Response.Write "<Select NAME='Choose'>"
Response.Write "<option value='begin'>Select Option</option>"
Response.Write "<option value='option1' onClick=""document.forms[0].myTarget.value='"  & "extraText';"">extraText</option>"
Response.Write "</SELECT>"
Response.Write "Description: <input name='myTarget' id='desc' type=text size=40 >"
Response.Write "</form>"
Response.Write "<input type=submit value='USE >"

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