Re: Netbeans/Hidden field question

Hi Neil,

Below is an OnClick() script that I just tried that worked.  One thing I
found out was that in 6.1 you have to right-click on the hidden field
and select "add binding attribute".  Otherwise it never assigns the
value to the field that you set in the "text" parameter of the visual
editor.

I put a hidden field on the page named hiddenField1.  After I added the
binding attribute I set the text of the field to "alert" in the
parameter window for the field.  The field can have text even though you
can't see it.  To stuff a value in it in Java use
hiddenField1.setText("your text");

WARNING- Do Not put a value in for "text" for your textField or
hiddenField in the visual editor if you set the value in your program.  
If you do it will override whatever you set programatically for the
initial load of the page.  I went nuts trying to figure that one out.

I set the value of the hiddenField in the visual editor just for this
test.  It's OK to do this  if you always want the page to do its first
load with a fixed value.

The Javascript for onClick is:

var hiddenText=document.getElementById("form1:hiddenField1").value;

if (hiddenText=="alert"){
    alert("Hidden Field is alert");
} else {
    alert("Hidden field is not alert");
}

You can look in HTTP Monitor in Netbeans and click on the last POST for
Page1.jsp to see what is in the fields before and after the page is
submitted.  Clear the entrie in HTTP Monitor if you have too much stuff
in there (right-click the "All Records" or "Current Records" folder icon
and select "Delete All").

The component names are all there too.  Only textField components have
the "_field" added to the name.  It is hard to see the underscore in the
HTTP Monitor but it is there.

To set "clean/dirty" initialize it in the init() method with something like:

if (!this.isPostBack()) {
    hiddenField1.setText("clean");
}

This will only set "clean" on the first load (not a postBack).

Then for each component that can "dirty" it up, put this in the
onChange() Javascript:

document.getElementById("form1:hiddenField1").value="dirty";

You can change a visible textField like:

document.getElementById("form1:textField1_field").value="changed in
Javascript";

You can open the error console on your browser to see if there are any
errors in your Javascript when it executes.

Hope this helps!

Rick
-------------------

Neil B. Cohen wrote:

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