Clicking on the button will send the visitor to a random link from the link array.

random link button

<script>
    var debug = false;
    var randomLink = function(){    
    var links = [
            "http://yoursite.com/page1",
            "http://yoursite.com/page2",
            "http://yoursite.com/page3",
            "http://yoursite.com/page4",
        ];
        var rand = Math.floor(Math.random()*links.length)
        if (debug) console.log(rand);        
        var url = links[rand];
        if (debug) console.log(url);
        var name;
        if (debug)
            name = "_blank";
        else
            name = "_self";
        window.open(url, name);
    }    
</script>

<button type="button" onclick="randomLink()"> Click Me
</button>