Safari,Chromem运行无误。IE,FF就有问题

<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Baseball Cap</title></head>
<script Language="JavaScript">
var mianliaovalue=0;
var chicunvalue=0;function finalsum(){
sumtext.value = mianliaovalue + chicunvalue;
}
</script>
<body>
<form id="form1" name="form1" method="post" action="">
  <table width="100%" border="0">
    <tr>
      <td><strong>基本</strong></td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <td>面料</td>
      <td><label>
        <input type="radio" name="mianliao" id="10858" value="10858" onClick="mianliaovalue=10858" />
      </label>
      10858</td>
      <td><label>
        <input type="radio" name="mianliao" id="10x10" value="1010" onClick="mianliaovalue=1010" />
</label>10x10</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <td>尺寸</td>
      <td><label>
        <input type="radio" name="chicun" id="nankuan" value="qianpian" onClick="chicunvalue=1000" />
      </label>
        Men</td>
      <td><input type="radio" name="chicun" id="nvkuan" value="qianpian" onClick="chicunvalue=2000" />
        Ladies</td>
      <td><input type="radio" name="chicun" id="tongkuan" value="qianpian" onClick="chicunvalue=3000" />
        Children</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <td>&nbsp;</td>
      <td><label>
        <input type="button" name="submit" id="submit" value="OK" onClick="finalsum();"/>
        <input type="text" name="sumtext" id="sumtext"/>
      </label></td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
  </table>
</form>
</body>
</html>不知道是哪里的问题啊
谢谢啦