JavaScript Exception

Hi.

You don't need an exception: just lock all fields, then unlock the button.

for (var i = 0; i < this.numFields; i++) {
    var fname = this.getNthFieldName(i);
    this.getField(fname).readonly = true; // makes all fields readonly
    }
this.getField(MYBUTTON).readonly = false;

Try this:

for (var i = 0; i < this.numFields; i++) {
    var fname = this.getNthFieldName(i);
    if (fname !== "NameOfButtonToExclude") {
        this.getField(fname).readonly = true; // makes all fields readonly
    }
}

but replace "NameOfButtonToExclude" with the actual name of the button you want to exclude.