我如何在JavaScript中使用innerhtml？ [英] How can I use innerhtml in JavaScript?

问题描述

我的问题是我不知道如何显示我的表单的innerhtml。

表单就像一个调查表单，一旦您点击提交按钮，所有我已经回答的内容将显示为一个摘要页面...

  function displayResult（）{
 var first = document.getElementById（first）.value; 
 
 var middle = document.getElementById（middle）。value; 
 
 var last = document.getElementById（last）。value; 
 
 alert（哦）; 
 var maincontent = document.getElementById（content）。innerHTML; 
 maincontent =< p> +第一; 
 
 $ b  

解决方案

var maincontent = document.getElementById（content）。innerHTML;
maincontent =< p> +第一;


在第二行覆盖变量，而不是设置。的innerHTML 。这是你想要的：

  var maincontent = document.getElementById（content）; 
 maincontent.innerHTML =< p> +第一; 
  

另外，您必须确保带有first，middle和last实际上是存在的，或者这可能导致 TypeError 。

My problem is that I don't know how to show the innerhtml of my form.

The form is like a survey form and once you clicked the submit button, all the contents I had answered would show like a summary page...

function displayResult() {
    var first = document.getElementById("first").value;

    var middle = document.getElementById("middle").value;

    var last = document.getElementById("last").value;

    alert("oh");
    var maincontent = document.getElementById("content").innerHTML;
    maincontent = "<p>" + first;

}

解决方案

var maincontent = document.getElementById("content").innerHTML;
maincontent = "<p>" + first;

On the second line you're overwriting the variable, not setting the .innerHTML. This is what you want:

var maincontent = document.getElementById("content");
maincontent.innerHTML = "<p>" + first;

Also, you must make sure the elements with ids of "first" "middle" and "last" actually exist, or this might cause a TypeError.

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