Author： YangQingQing
<!DOCTYPE html>
<html><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><head><title>demo</title><script>var obj = document.getElementById("div_id");function hideOrShowEvent(){ var obj= document.getElementById("div_id");if(obj.style.display=="block"){ //如果是显示则隐藏 obj.style.display="none";}else{ //如果是隐藏则显示 obj.style.display="block";}}</script></head><body><div id="div_id" style="border:1px solid red;display:block;" > 这里是内容 </div><button type="button" οnclick=hideOrShowEvent()> 点击隐藏或显示 </button></body></html>