Heard you liked Rename Presets.
Swap Names.orp (822 Bytes)
var tab = DOpus.listers.lastactive.activetab;
var i = 0;
var k = tab.selected.count;
function OnGetCustomFields(getFieldData) {
getFieldData.fields.swapExtension = true;
getFieldData.field_labels('swapExtension') = 'Swap extension';
}
function OnGetNewName(getNewNameData) {
var swapExtension = getNewNameData.custom.swapExtension;
var j = (i % 2) == 0 ? i + 1 : i - 1;
var tmp = j < k ? tab.selected(j).name_stem + tab.selected(swapExtension ? j : i).ext : false;
i++;
return tmp;
}