TOS & Privacy

HTML

<ul>
    <li>First condition</li>
    <li>Second condition</li>
    <li>Third condition</li>
    <li>Forth condition</li>
</ul>
<button id="continue">I accept that.</button>

JavaScript

$(function(){
    
    $('ul li:not(:first-child)').slideUp();
    $('button').click(function(){
        
        $btn = $(this);
        
        $('ul li:visible')
        .slideUp()
        .next()
        .slideDown();
        
        $btn.attr('disabled','');
        
        setTimeout(function(){
            $btn.removeAttr('disabled');
        }, 3000);
        
    });
    
});