onChange + javascript in perl CGI - question

matrixmadhan · #1 (**permalink**) 07-27-2008

Hello all,

Am trying to include a onChange java script to my perl CGI application which uses POST method to upload files to file_server

This is how I embedded javascript in the perl code that renders CGI application

Code:

print qq|
  <script type="text/javascript" src="display.js">
  </script>
  |;

Contents of display javascript are :

Code:

function changeDispatch(newLink) {
  if ( newLink != null ) {
    document.location.href = newLink;
  }
}

This is the popup menu, when an item is selected from the list it should automatically trigger the action designation instead of a separate "GO" ( submit ) button for each of the popup menu that I have got.

Code:

print $cgi->popup_menu(-name=>'fruits',
                         -values=>$fruits_arr,
                         -onChange=>"changeDispatch('$arg')");

Here in '$arg' if am able to store the selected value from the popup_menu, then its quite easy to formulate a string and pass it to changedDispatch in javascript.
But am not able to retrieve any such data

Whats happening :
If I click on any of the fruits say, "apple" the onClick effect is happening and it comes to the same initial page. If that is, fruits.cgi once I click that - it again comes to fruits.cgi as though it has been loaded for the first time

What I want to happen :
Based on the onClick event, I have other functions to be dispatched via GUI. That would seem to happen only when I know what option is clicked.

I accept that am not that good when it comes to GUI design or adding effects to that.

I have seen several website doing this, it should be something very easy for those who had already worked on this.
Could you please provide some pointers ?

thanks

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