开关盒在javascript中无法正常工作

Question

I Have Written This Code For Link Redirection But The Problem With The Code It Triggered Only First Case It Omits Other Cases In The Switch Statement

<script type="text/javascript"> 
window.onload = function () {
    var links = document.getElementsByTagName("a");
    for (var i = 0; i < links.length; i++) {
        var string = links[i].href; //href value
        var str = string;
        var spl = string.split("/");
        switch (spl[2]) {

            case 'www.google.com':
                var str1 = "http://yahoo.com";
                links[i].target = "_blank";
                var m = links[i].addEventListener("mouseup", function () {
                    window.open(str1)
                }, false);
                return (m);
                break;

            case 'www.ebay.com':
                var str1 = "http://yahoo.com";
                links[i].target = "_blank";
                var m = links[i].addEventListener("mouseup", function () {
                    window.open(str1)
                }, false);
                return (m);
                break;

            default:
                links[i].href = string;
        }

    }
}
</script> 

HTML:

<a href="http://www.google.com/">www.google.com</a></br>
<a href="http://www.ebay.com/">www.ebay.com</a></br>

Answer 1

Since you have return(m); here, it returns from there and do not execute the rest of the code. you can test it by putting alert("Hi"); after the return statement. This alert should not work for your code.

<script type="text/javascript"> 
window.onload = function () {
    var links = document.getElementsByTagName("a");
    for (var i = 0; i < links.length; i++) {
        var string = links[i].href; //href value
        var str = string;
        var spl = string.split("/");
        switch (spl[2]) {

            case 'www.google.com':
                var str1 = "http://yahoo.com";
                links[i].target = "_blank";
                var m = links[i].addEventListener("mouseup", function () {
                    window.open(str1)
                }, false);
                break;

            case 'www.ebay.com':
                var str1 = "http://yahoo.com";
                links[i].target = "_blank";
                var m = links[i].addEventListener("mouseup", function () {
                    window.open(str1)
                }, false);
                break;

            default:
                links[i].href = string;
        }

    }
}
</script> 

Answer 2

Remove return(m) from above code. It should work fine. It's return after first call.