Next and Previous buttons that save and go to next/previous record

Are you customizing the display or edit form?

Editing the form

Here is my current code that is in the Custom JavaScript of the Form

function saveNext() {NWF$("input[value='Save']").click(); window.location = "Site URL/Lists/List Name/EditForm.aspx?ID="+ (ID+1)};

function savePrevious() {NWF$("input[value='Save']").click(); window.location = "Site URL/Lists/List Name/EditForm.aspx?ID="+ (ID-1)};