//判斷指定父元素下，是否有子元素，如果無(wú)則隱藏父元素。var pre = document.getElementById("pre");?var next = document.getElementById("next");var pre_child = pre.getElementsByTagName("a");var next_child = next.getElementsByTagName("a");if (next_child.length==0) {? ? next.style.display = "none";}else if (pre_child.length==0) {? ? pre.style.display = "none";}else{}
JS代碼，這個(gè)代碼有錯(cuò)么？
網(wǎng)頁(yè)設(shè)計(jì)學(xué)習(xí)者
2018-12-27 19:14:48
