JSFiddle - React, Tailwind, and code Playground

HTML

<input type="button" value=" Toggle " /><br/>
<img id="toggle" />

JavaScript

(function() {
    var count = 1;
    function toggle() 
    {
        $("#Layer4").animate({height:'toggle'});
        $("#Layer6").animate({height:'toggle'});

        $("#toggle").attr('src',"toggle_" + (count++ % 2 ? "up" : "down") + ".jpg");
        
        // Just to test:
        alert($("#toggle").attr("src"));

    }
    $(function() {
        $("input").click(toggle);
    });
}());