Setting an image Url for a listitem

[Oded]

Hello,

I have a two listboxes that I use to transfer items from one to another. On my destination listbox I want to set one item as a default item.
I have decided to add a button that will take the selected item and set an image to it to indicate that this item is the default one.

I have done so using javascript:

function setDefaultReport() {
                selectedReportsList.trackChanges();
                var selectedItem = selectedReportsList.get_selectedItem();
                if (selectedItem) {
                    if (defaultReport) {
                        defaultReport.set_imageUrl("");
                        }
                    }
                    selectedItem.set_imageUrl("/images/icon.gif");
                    defaultReport = selectedItem;
                }
                selectedReportsList.commitChanges();
            }

When I push the button to run this function I get an invalid argument error during runtime of the script. It happens in the insertBefore function of the current list item.

Any ideas?

Thanks,
Oded

[Schlurk]

Have you tried doing this server-side as in this demo? Since you're clicking on a button already that could be viable option.

[Oded]

Server side solution is not relevant in this situation. Any way, I have decided to use checkboxes instead.

Thank you.