js刷新验证问题

Question

function lcl(s){
  
  if (s=='audio'){
    var arrMustFill=Array("material_id","title","content_type","artist","album");//将必填的控件ID放入数组
    for(var i=0;i<arrMustFill.length;i++){
    document.getElementById(arrMustFill[i])
      document.getElementById(arrMustFill[i]).outerHTML+="<font color='#FF0000'>*必填</font>"
    }
    
  }
  else if(s=='ringtone'){
       var arrMustFill=Array("material_id","title","content_type","artist","album");
      for(var i=0;i<arrMustFill.length;i++){    
      document.getElementById(arrMustFill[i]).outerHTML+="<font color='#FF0000'>*必填</font>"
    }
  }
  else if(s=='video'){
      var arrMustFill=Array("material_id","title","content_type","artist","description","image_url");
      for(var i=0;i<arrMustFill.length;i++){
      document.getElementById(arrMustFill[i]).outerHTML+="<font color='#FF0000'>*必填</font>"
    }
  }
  else if(s=='image'){
      var arrMustFill=Array("material_id","title","content_type","image_url");
      for(var i=0;i<arrMustFill.length;i++){
      document.getElementById(arrMustFill[i]).outerHTML+="<font color='#FF0000'>*必填</font>"
    }
  }
   else if(s=='game'){
      var arrMustFill=Array("material_id","title","content_type","image_url","description","developer","app_platform","service_id","price");
      for(var i=0;i<arrMustFill.length;i++){
      document.getElementById(arrMustFill[i]).outerHTML+="<font color='#FF0000'>*必填</font>"
    }
  }
  document.getElementById("content_type").value=s;
    
} <table align="center" width="100%" style="display: block" border="1"
                cellspacing="0" bordercolor="#000000">
                <tr>
                    <td>
                        素材id:
                        <input type="text" size="50" id="material_id" name="material_id"
                            value="<%=material_id%>">
                    </td>
                </tr>
                <tr>
                    <td>
                        标题：
                        <input type="text" size="50" id="title" name="title"
                            value="<%=mp.getNAME()%>">
                    </td>
                </tr>
                <tr>
                    <td>
                        类型：
                        <select id="content_type" name="content_type" onchange="javascript:langchunlin(this.value);">
                            <option value="image">
                                图片
                            </option>
                            <option value="ringtone">
                                铃音
                            </option>
                            <option value="video">
                                视频
                            </option>
                            <option value="audio">
                                音乐
                            </option>
                            <option value="game">
                                游戏
                            </option>
                        </select>
                    </td>
                </tr>
                <tr>
                    <td>
                        image_url:
                        <input type="text" size="50" id="image_url" name="image_url"
                            value="http://218.206.70.172/<%=mp.getPREVFILE()%>">
                    </td>
                </tr>
                <tr>
                    <td>
                        artist:
                        <input type="text" size="50" id="artist" name="artist" value="">
                    </td>
                </tr>
                <tr>
                    <td>
                        album:
                        <input type="text" size="50" id="album" name="album" value="">
                    </td>
                </tr>
                <tr>
                    <td>
                        description:
                        <input type="text" size="50" id="description" name="description"
                            value="">
                    </td>
                </tr>
                <tr>
                    <td>
                        developer:
                        <input type="text" size="50" id="developer" name="developer"
                            value="">
                    </td>
                </tr>
                <tr>
                    <td>
                        app_platform:
                        <input type="text" size="50" id="app_platform" name="app_platform"
                            value="">
                    </td>
                </tr>
                <tr>
                    <td>
                        service_id:
                        <input type="text" size="50" id="service_id" name="service_id"
                            value="">
                    </td>
                </tr>
                <tr>
                    <td>
                        price:
                        <input type="text" size="50" id="price" name="price" value="">
                    </td>
                </tr>
                <tr>
                    <td>
                        <input type="button" value="提交" onclick="submits()">
                    </td>
                </tr>
            </table>
其中 <select id="content_type" name="content_type" onchange="javascript:lcl(this.value);">调用它，我会出现我选图片，相对图必填的几项后面给加上*必填，可现在出现个问题我点图片加上了*必填，我在别的在*必填后面又加上个*必填，我想把之前的去掉，就留一个，我之前试过刷新，可在ie浏览器可以实现，换个浏览器就不行了，谁有好办法