Javascript error : invalid assignment left-hand side

Question

Using javascript in Acrobat XI. For some reason, I keep getting the following error:

invalid assignment left-hand side at 9: line 10

My code is pretty simple and looks spot on AFAICT. Please review and tell me I'm not crazy. (Or tell me I am, but you have a solution :))

function jsNetworkAccount()
{

    // Get a reference to each check box
    var f1 = getField("cbNetworkNotNeeded");
    var f2 = getField("cbNetwork");
    var f3 = getField("cbEmailAccount");

    if (event.target === f1 && event.value = "On") {

           f2.value = "Off";
           f3.value = "Off";
           return;
    }

    if (event.target === f2 || event.target === f3 && event.value = "On") {

           f1.value = "Off"
           return;

    }    
}

Answer 1

Two equal signs:

if (event.target === f1 && event.value =   "On") {
// -------------------------------------^^
if (event.target === f1 && event.value === "On") {


if (event.target === f2 || event.target === f3 && event.value =   "On") {
// ------------------------------------------------------------^^
if (event.target === f2 || event.target === f3 && event.value === "On") {

I used three equal signs in my code above for keeping your coding style consistent.

As vol7ron suggested, you should also add parentheses in your IF statements. This greatly improves readability in my opinion.