Pdf form conditional checkboxes

Question

Hi.
I'm building a pdf form in Acrobat 8 Professional. I want to add JavaScript to 3 checkboxes to achieve the following:
if checkbox 1 or 2 is checked, uncheck checkbox 3; and if checkbox 3 is checked uncheck both 1 and 2.
It seems straightforward, but I have not been able to find a solution either in the Acrobat guide nor online. I have no experience in Javascript other than copying and pasting, so I'm not sure I'm using the right language to search. If anyone can provide any guidance, I would greatly appreciate it.
Thanks a lot!

Answer 1

Well, a little bit late but thanks for this anyway. Very helpful.
I've another question related to this matter. How can I make polish this code and apply to various groups of checkboxes without creating an endless list of variables?
function Caselles()
// Get a reference to each check box 
    var f1 = getField("C1"); 
    var f2 = getField("C2"); 
    var f3 = getField("C3"); 
    var f4 = getField("C4");
    var f5 = getField("C5");
    // Uncheck c2, c3 and c4 if c1 was selected/deselected 
    if (event.target === f1) {
        f2.value = "Off"; 
        f3.value = "Off";
        f4.value = "Off";
    // Uncheck c3 and c4 and check c1 when c2 was selected/deselected 
    if (event.target === f2) {
        f1.checkThisBox(0,true);
        f3.value = "Off";
        f4.value = "Off";
    // Uncheck c4 and check c1 and c2 when c3 was selected/deselected
     if (event.target === f3) {
          f1.checkThisBox(0,true);
          f2.checkThisBox(0,true);
          f4.value = "Off";
    // Check all when c4 was selected/deselected
     if (event.target === f4) {
          f1.checkThisBox(0,true);
          f2.checkThisBox(0,true);
          f3.checkThisBox(0,true);
Thanks in advance!