用js如何修改div的内容的具体操作步骤如下：
1、首先在电脑的桌面上点击打开“html”应用程序，接着在此“html”应用程序中点击进行打开要进行操作的html文件。
2、打开此应用程序之后，接着在此文件的页面内点击进行创建“button按钮”，接着手动给此按钮设置一个id，在此将按钮的id设置为“show”，接着再在其中进行输入“”。
3、接着再在此应用程序中进行创建一个隐藏的div，然后再将需要进行修改的内容写到或者复制粘贴到此文件上，接着再为其设置id，在此设置为“hide”，然后再进行输入“
我是隐藏的div
”。
4、然后接着在此页面内的
标签后面为id为hide设置其样式为“display:none”然后再输入“<style>#hide{display: none;padding-top: 15px;}</style>”，然后就修改完成了。</p>
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<p><br><img loading="lazy" class="ikqb_img" src="/picurl?url=https%3A%2F%2Fiknow-pic.cdn.bcebos.com%2F0dd7912397dda14407c9ed22bcb7d0a20df4865a%3Fx-bce-process%3Dimage%252Fresize%252Cm_lfit%252Cw_600%252Ch_800%252Climit_1%252Fquality%252Cq_85%252Fformat%252Cf_auto" esrc="https://iknow-pic.cdn.bcebos.com/0dd7912397dda14407c9ed22bcb7d0a20df4865a"><br></p></p>
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<div class="wdhuidaxm">回答2：</div>
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<p><p>1、创建html文件，创建两个div，分别添加id。</p>
<p><img loading="lazy" class="ikqb_img" src="/picurl?url=https%3A%2F%2Fiknow-pic.cdn.bcebos.com%2F8644ebf81a4c510fe09cd1886e59252dd52aa5c3%3Fx-bce-process%3Dimage%252Fresize%252Cm_lfit%252Cw_600%252Ch_800%252Climit_1%252Fquality%252Cq_85%252Fformat%252Cf_auto" esrc="https://iknow-pic.cdn.bcebos.com/8644ebf81a4c510fe09cd1886e59252dd52aa5c3"></p>
<p>2、创建js脚本，获取div，并修改里面的内容。</p>
<p><img loading="lazy" class="ikqb_img" src="/picurl?url=https%3A%2F%2Fiknow-pic.cdn.bcebos.com%2Fd439b6003af33a87ba39c98bc85c10385243b5cf%3Fx-bce-process%3Dimage%252Fresize%252Cm_lfit%252Cw_600%252Ch_800%252Climit_1%252Fquality%252Cq_85%252Fformat%252Cf_auto" esrc="https://iknow-pic.cdn.bcebos.com/d439b6003af33a87ba39c98bc85c10385243b5cf"></p>
<p>3、div里面的内容被修改。</p>
<p><img loading="lazy" class="ikqb_img" src="/picurl?url=https%3A%2F%2Fiknow-pic.cdn.bcebos.com%2F0b46f21fbe096b63c33868c202338744ebf8ac7a%3Fx-bce-process%3Dimage%252Fresize%252Cm_lfit%252Cw_600%252Ch_800%252Climit_1%252Fquality%252Cq_85%252Fformat%252Cf_auto" esrc="https://iknow-pic.cdn.bcebos.com/0b46f21fbe096b63c33868c202338744ebf8ac7a"></p>
<p>4、获取刚刚div设置字体颜色。</p>
<p><img loading="lazy" class="ikqb_img" src="/picurl?url=https%3A%2F%2Fiknow-pic.cdn.bcebos.com%2F574e9258d109b3de09dcd2fac2bf6c81810a4cc4%3Fx-bce-process%3Dimage%252Fresize%252Cm_lfit%252Cw_600%252Ch_800%252Climit_1%252Fquality%252Cq_85%252Fformat%252Cf_auto" esrc="https://iknow-pic.cdn.bcebos.com/574e9258d109b3de09dcd2fac2bf6c81810a4cc4"></p>
<p>5、然后通过js设置字体的大小。</p>
<p><img loading="lazy" class="ikqb_img" src="/picurl?url=https%3A%2F%2Fiknow-pic.cdn.bcebos.com%2F203fb80e7bec54e7594c2c8cb7389b504ec26afb%3Fx-bce-process%3Dimage%252Fresize%252Cm_lfit%252Cw_600%252Ch_800%252Climit_1%252Fquality%252Cq_85%252Fformat%252Cf_auto" esrc="https://iknow-pic.cdn.bcebos.com/203fb80e7bec54e7594c2c8cb7389b504ec26afb"></p>
<p>6、效果如图。</p>
<p><img loading="lazy" class="ikqb_img" src="/picurl?url=https%3A%2F%2Fiknow-pic.cdn.bcebos.com%2F8b82b9014a90f6038735aad53712b31bb151ed9f%3Fx-bce-process%3Dimage%252Fresize%252Cm_lfit%252Cw_600%252Ch_800%252Climit_1%252Fquality%252Cq_85%252Fformat%252Cf_auto" esrc="https://iknow-pic.cdn.bcebos.com/8b82b9014a90f6038735aad53712b31bb151ed9f"></p></p>
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<div class="wdhuidaxm">回答3：</div>
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<p>在ie里面不支持getElementsByTagName()方法。<br>所以你只能这样<br>var o=document.getElementById("a").getElementsByTagName("div");<br>foreach(var i=0;i<o.length;i++){<br>if(o[i].className=="b"){<br> o[i].innerHTML="your str";<br>}<br>} <br><br>当然使用jquery框架就舒服多了<br>$("#a .b").html("your str");<br>搞定。</p>
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<div class="wdhuidaxm">回答4：</div>
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<p>如果用了jquery：<br> $("#a").find(".b").html("这里是修改后的内容!"); <br> // 结果：...<div class="b">这里是修改后的内容!</div>...<br><br>原生js控制：<br> document.getElementById("a").childNodes[0].innerHtml="这里是修改后的内容!"; <br> // 结果：...<div class="b">这里是修改后的内容!</div>...</p>
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<div class="wdhuidaxm">回答5：</div>
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<p>document.getElementById("a").childNodes[0].className="newb";</p>
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