AcrobatUsers.com-q288007

this.resetForm();
this.syncAnnotScan();
var annots = this.getAnnots({nPage:0});

if (annots) {
    for (var i = annots.length - 1; i >= 0; i--) {
        if (annots[i].type == "FileAttachment") {
        annots[i].destroy();
        }
    }
}

var f = this.getField("ListBox4");
f.clearItems();