<div class="support-agent support-agent-input"><label class="next-checkbox "><span class="next-checkbox-inner"><i class="next-icon next-icon-select next-icon-xs"></i></span><input type="checkbox" data-trace-click="dx_gj_offers_support_agent" aria-checked="false" value="on"></label><span class="support-desc">支持</span></div>checkbox 的代碼如上，由于代碼中沒有id，想外面調(diào)用js 讓他為選中打鉤的狀態(tài)，請問代碼應(yīng)該怎么寫？