Javascript 不从单选按钮和隐藏框读取值

Question

当我选择单选按钮时，我的其他功能会启用文本框并且我想从中读取值

function calculate() {
  var currency = parseFloat(0);
  var message = "";


  currency = document.getElementsByName("val")[0].value;

  message = ("You Have Entered Amount : " + currency);

  document.getElementById("result").innerHTML = message;
}

<td>
  <input type="radio" name="inputControl" value="1" onchange="setvisible(this.value)"> Euro
</td>

<td><input type="number" name="val" size="10" id="set1" style="visibility:hidden;">
</td>

Answer 1

删除[0].value部分。试试这个

currency=document.getElementsByName("val")