JS 判斷是IE版本和浏覽器類型

<script type="text/javascript">

var browser=navigator.appName

var b_version=navigator.appVersion

var version=b_version.split(";");

var trim_Version=version[1].replace(/[ ]/g,"");

if(browser=="Microsoft Internet Explorer" && trim_Version=="MSIE7.0")

{

    alert("IE 7.0");

}

    else if(browser=="Microsoft Internet Explorer" && trim_Version=="MSIE6.0")

{

    alert("IE 6.0");

}

</script>

下面是我寫的一個經典例子

<div id="sitetips"  style="display: block">

       <table align="center" cellpadding="0" cellspacing="0" style="height:30px;">

              <tr>

                     <td align="center" valign="middle">

                     <script language="javascript">

                            document.write("<span>您正在使用Internet Explorer 6，在本站頁面的顯示效果可能有差異。建議您升級到<a href='http://www.microsoft.com/china/windows/internet-explorer/' target='_blank'>Internet Explorer 8</a> </span>");

                     </script>

                     </td>

              </tr>

       </table>

</div>

 <script> if (Fai.isIE7() || Fai.isIE6()) { document.getElementById('sitetips').style.display='block'; } </script>