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Top Forums UNIX for Dummies Questions & Answers onChange + javascript in perl CGI - question Post 302218848 by cbkihong on Sunday 27th of July 2008 10:00:48 AM
Old 07-27-2008
You did not show anything about the onClick, but I assume if you want to capture onChange you ought not be implementing onClick? Even though theoretically they do not interfere if you do them properly, it may be a source of confusion unless you know you are doing it the right way.

Do you get any expected values for $arg? Seems like from your post you don't but I am not totally clear about that. If so, you should first concentrate on getting $arg to carry the value you expect first.

How do you get the value of $arg? I assume you used CGI->param()?

By the way, have you tested the changeDispatch() Javascript function separately using a static HTML test page before? If you look at DOM:document.location - MDC there is a note saying the use of document.location.href as a write property is not portable. In fact I have only used

window.location = url;

in the past. I have not seen anyone making a redirect like you did (using document.location.href) before. Are you sure that function is working properly?

If everything fails, I suggest you to:

(1) Check the Javascript debugger for any relevant error messages
(2) Re-post with the HTML generated by Perl. Because your issue is not related to Perl but HTML and Javascript, the abstraction by Perl CGI may mask investigation.
 

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javascript(n)						  HTML and Java Script Generation					     javascript(n)

__________________________________________________________________________________________________________________________________________________

NAME
javascript - Procedures to generate HTML and Java Script structures. SYNOPSIS
package require Tcl 8 package require javascript ?1.0.2? ::javascript::makeSelectorWidget id leftLabel leftValueList rightLabel rightValueList rightNameList ?length? ?minWidth? ::javascript::makeSubmitButton name value ::javascript::makeProtectedSubmitButton name value msg ::javascript::makeMasterButton master value slavePattern boolean ::javascript::makeParentCheckbox parentName childName ::javascript::makeChildCheckbox parentName childName _________________________________________________________________ DESCRIPTION
The ::javascript package provides commands that generate HTML and Java Script code. These commands typically return an HTML string as their result. In particular, they do not output their result to stdout. ::javascript::makeSelectorWidget id leftLabel leftValueList rightLabel rightValueList rightNameList ?length? ?minWidth? Construct HTML code to create a dual-multi-selection megawidget. This megawidget consists of two side-by-side multi-selection boxes separated by a left arrow and a right arrow button. The right arrow button moves all items selected in the left box to the right box. The left arrow button moves all items selected in the right box to the left box. The id argument is the suffix of all HTML objects in this megawidget. The leftLabel argument is the text that appears above the left selection box. The leftValueList argu- ment is the values of items in the left selection box. The leftNameList argument is the names to appear in the left selection box. The rightLabel argument is the text that appears above the right selection box. The rightValueList argument is the values of items in the right selection box. The rightNameList argument is the names to appear in the right selection box. The length argument (optional) determines the number of elts to show before adding a vertical scrollbar; it defaults to 8. The minWidth argument (optional) is the number of spaces to determine the minimum box width; it defaults to 32. ::javascript::makeSubmitButton name value Create an HTML submit button that resets a hidden field for each registered multi-selection box. The name argument is the name of the HTML button object to create. The value argument is the label of the HTML button object to create. ::javascript::makeProtectedSubmitButton name value msg Create an HTML submit button that prompts the user with a continue/cancel shutdown warning before the form is submitted. The name argument is the name of the HTML button object to create. The value argument is the label of the HTML button object to create. The msg argument is the message to display when the button is pressed. ::javascript::makeMasterButton master value slavePattern boolean Create an HTML button that sets its slave checkboxs to the boolean value. The master argument is the name of the child's parent html checkbox object. The value argument is the value of the master. The slaves argument is the name of child html checkbox object to create. The boolean argument is the java script boolean value that will be given to all the slaves; it must be "true" or "false". ::javascript::makeParentCheckbox parentName childName Create an HTML checkbox and tie its value to that of its child checkbox. If the parent is unchecked, the child is automatically unchecked. The parentName argument is the name of parent html checkbox object to create. The childName argument is the name of the parent's child html checkbox object. ::javascript::makeChildCheckbox parentName childName Create an HTML checkbox and tie its value to that of its parent checkbox. If the child is checked, the parent is automatically checked. The parentName argument is the name of the child's parent html checkbox object. The childName argument is the name of child html checkbox object to create. BUGS, IDEAS, FEEDBACK This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category javascript of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have for either package and/or documentation. SEE ALSO
html, ncgi KEYWORDS
checkbox, html, javascript, selectionbox, submitbutton CATEGORY
CGI programming javascript 1.0.2 javascript(n)
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