Javascript将两个变量与＆＃34; - ＆＃34;

Question

我想连接两个变量。当我使用alert收到此错误消息[object HTMLInputElement] - [object HTMLInputElement]。

    var Name = document.getElementById("thevoornaam");
    var DoB = document.getElementById("thedate");

    var catVar = Name + "--" + DoB;
    alert(catVar);

有人可以帮帮我。

Answer 1

首先，您需要使用.value

来获取值

    var Name = document.getElementById("thevoornaam").value;
    var DoB = document.getElementById("thedate").value;

    var catVar = Name + "--" + DoB;
    alert(catVar);

Answer 2

window.onload = function (){

  var Name = document.getElementById("thevoornaam").innerHTML ;
  var DoB = document.getElementById("thedate").innerHTML ;

  var catVar = Name + "--" + DoB;

 document.getElementById("result").innerHTML  = catVar;

};

v1: <span id="thevoornaam">Name</span> <br />
v2: <span id="thedate">DoB</span>
<hr />
r: <span id="result"></span>