Modifying the online donations page in public views

Hi,

I have a customer who is running iMIS 15.1.3.8125 and wants a few minor customisations to their online donations in public views. 

I've made a copy of Gift.aspx and Gift.ascx.  The client would liike to call the donations page with a predetermined amount so I've added some javascript to populate the amount value from a query string parameter.  The customer would also like to change the prompt next to the Amount field (currently  "Other") to be "$".  The Other label is part of a radio button list and therefore not defined (or changeable) the way some lables are in the ascx file.

There is some javascript that iterates through the radio button list and selects the Other radio button which I've looked into:

    function SelectOther() {
        var RadioButtonList = document.getElementById(giftAmountClientId);
        var rows = RadioButtonList.rows;
        for (var i = 0; i < rows.length; i++) {
            for (var j = 0; j < rows[i].cells.length; j++)
                for (var k = 0; k < rows[i].cells[j].childNodes.length; k++) {
                    if (rows[i].cells[j].childNodes[k].getAttribute("value") == "") {
                        rows[i].cells[j].childNodes[k].checked = true;
                        break;
                    }
                }
        }
    }

However I've been unable to find the Other label to try and change it.

If anyone has an idea of where to look, or has modified this control before be glad to hear from them.