// HTML代码
<input type="radio" name="redirect" value="page1">页面1
<input type="radio" name="redirect" value="page2">页面2
<input type="radio" name="redirect" value="page3">页面3
<button onclick="redirect()">提交</button>

// JavaScript代码
function redirect() {
  var radios = document.getElementsByName("redirect");
  var selectedValue;
  for (var i = 0; i < radios.length; i++) {
    if (radios[i].checked) {
      selectedValue = radios[i].value;
      break;
    }
  }
  if (selectedValue) {
    window.location.href = selectedValue + ".html";
  }
}