刷新页面后，单选按钮可以为空吗

我的表单中有两个单选按钮.现在我发现，在某些浏览器(firefox和google chrome)中，如果您刷新表单，则在刷新之前选择了一个单选按钮，然后在刷新之后仍然选择了该单选按钮.我想知道有没有一种方法可以使用javascript代码说页面重新加载或刷新时不应该选择任何单选按钮，或者这完全取决于浏览器吗?

I have two radio buttons in my form. Now what I found out is that in some browsers (firefox and google chrome) if you refresh the form, is a radio button was selected before the refresh, then after the refresh the radio button is still selected. I want to know is there a way by using javascript code to be able to say no radio buttons should be already selected when page reloads or refreshes or does it all depend on browser?

以下是javascript中单选按钮的代码:

Below is code for radio buttons in javascript:

    var btnRadioO = document.getElementsByName("weightChoice");               
                    var isbtnRadioChecked = false;

      for(i=0; i < btnRadioO.length; i++){
                        if(btnRadioO[i].checked){
                            isbtnRadioChecked = true;
                        }
                    }

                    if(!isbtnRadioChecked) {
                       errRadioMsgO.innerHTML = "Please Select whether you want to include a Total Weight for your Session or Not";
                    tblWeightO.style.display = "none";
                       isDataValid = false;
                    }else if(btnRadioO[0].checked==true && weightO.value == 0){
                         errRadioMsgO.innerHTML = "";
                         errWeightMsgO.innerHTML = "You are including Weight so it Must be More Than 0";
                         isDataValid = false;
                         }else if(btnRadioO[1].checked==true){
                    errRadioMsgO.innerHTML = "";
                     errWeightMsgO.innerHTML = "";
                    tblWeightO.style.display = "none";
                         }else{
                             errRadioMsgO.innerHTML = "";


  errWeightMsgO.innerHTML = "";
                     }

HTML代码:

<table>
            <tr>
            <th>6: Provide a Total Weight for your Session</th>
            <td><input type="radio" name="weightChoice" value="yes" onClick="getWeight()"/> Yes</td>
            <td><input type="radio" name="weightChoice" value="No" onClick="getWeight()"/> No</td>
            </tr>
            </table>