set switch_link_html "<a href=\"weekly_report?[export_url_vars owner_id project_id duration display]"
set switch_link_html "<a href=\"weekly_report?[export_vars -url {owner_id project_id duration display}]"
set switch_past_html "$switch_link_html&start_at=$past_date&cost_center_id=$cost_center_id&department_id=$department_id&workflow_key=$workflow_key\">«</a>"
set switch_future_html "$switch_link_html&start_at=$future_date&cost_center_id=$cost_center_id&department_id=$department_id&workflow_key=$workflow_key\">»"