此JQuery代码有什么问题？

Question

<script src = "https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"></script>
<script type="text/javascript">                                         

//waits till the document is ready
$(document).ready(function() {
    //onclick function
    $('button.butter').click(function(){
        //code will only run on certain url
        if (pathname.indexOf("google")>= 0){
            alert('This doesn't work anymore!');  

           //replacer
          $("a[href*='https://google.com']").attr('href',('http://www.google.com/search?q' + $('#FormID').val()));
        }
        else{
            alert('Wrong page');
        }
    });
});

</script>

It doesn't alert, but why? This was working earlier and I forgot to save it. It should replace the url with another one plus the value from a field. edit: head, html, etc. tags are there.

<button class="butter">Press</button>

Answer 1

You don't declare pathname anywhere, this:

if (pathname.indexOf("google")>= 0){

should result in an error in your console.

Answer 2

我想你想要的是location.pathname而不是pathname