检测浏览器是IE 7还是更低？ [英] Detect whether browser is IE 7 or lower?

问题描述

因此，我将在我的网站上添加一个重定向，将每个使用ie 7或更低版​​本的用户折腾到不同的页面，并提供此JavaScript，但它似乎已停止工作。

 < script type =text / javascript> 
 if（/ MSIE（\ d + \.\d +）; /。test（navigator.userAgent））{//测试MSIE x.x; 
 var ieversion = new Number（RegExp。$ 1）//捕获xx部分并以数字形式存储
 if（ieversion <= 8）
 window.location =ie.html
} 
 window.location =main.html
< / script> 
  

解决方案

您的代码始终导致< C $ C> main.html中。即使代码落入< 8 ，如果设置为<$ c，您将会掉到



考虑重构：



• 在设置为即。

后设置返回

或

  var redir =main.html; 
 if（/ MSIE（\ d + \.\d +）; /。test（navigator.userAgent））
 {
 var ieversion = new Number（RegExp。$ 1）; 
 if（ieversion <= 8）
 {
 redir =ie.html; 
} 
} 
 window.location = redir; 
  

So i am going to add a redirect to my site to toss every one that is using ie 7 or lower off to a different page and came up with this JavaScript, but it seems to have stopped working.

<script type="text/javascript">
 if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)){ //test for MSIE x.x;
  var ieversion=new Number(RegExp.$1) // capture x.x portion and store as a number
   if (ieversion<=8)
    window.location = "ie.html" 
   }
   window.location = "main.html"
</script>

解决方案

Your code is always resulting to having gone to main.html. Even when the code falls into <8, you'll fall out of the if into setting to main.

Consider refactoring by either:

• setting a return after setting to ie.

or

var redir="main.html";
if (/MSIE (\d+\.\d+);/.test(navigator.userAgent))
{ 
   var ieversion=new Number(RegExp.$1);
   if (ieversion<=8)
   {
      redir = "ie.html";
   }
}
window.location = redir;

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