有没有办法停止使用javascript或jQuery进行URL重定向？

Question

for example when you click on this flickr url: http://www.flickr.com/photos/caterpiya/5716797477/sizes/h/

The /sizes/h/ changes to /sizes/l/ how can I stop it from making this change and be given an alert through Jquery or javascript if it goes to a 404?

<script>
    function yo(){
        var href = "http://www.flickr.com/photos/caterpiya/5716797477/"
        href = href+"sizes/h/";
        window.open(href);
    }
</script>
<button  onclick="yo()">open</button>

Answer 1

how about using a global variable? Something like:

<script>
    var isUrlClicked = false;

    function yo(){
        var href = "http://www.flickr.com/photos/caterpiya/5716797477/"
        href = href+"sizes/h/";
        isUrlClicked = true;
        window.open("href");
    }
</script>

<button  onclick="yo()">open</button>