<input type="text" id="myText">
<input type="radio" name="options" value="option1">选项1
<input type="radio" name="options" value="option2">选项2

var radioButtons = document.getElementsByName("options");
var textBox = document.getElementById("myText");

for (var i = 0; i < radioButtons.length; i++) {
  radioButtons[i].addEventListener("click", function() {
    textBox.value = "";
  });
}