Untitled

<!doctype html>
<html>
<head>
</head>
<body>
<button id="b1" type="button">Show Spoiler</button>
<p id="p1" style="display:none"> This is a damn paragraph.</p>

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script type="text/javascript" src="js/script.js"></script>
</body>
</html>

function bindEvent(element, eventName, eventHandler) {
    var el = $(element)[0];
    if (el.addEventListener) {
        el.addEventListener(eventName, eventHandler, false)
    } else if (el.attachEvent) {
        el.attachEvent('on'+eventName, eventHandler);
    }
}
bindEvent('#b1', 'click', function() {
    $('#p1').toggle('blind');
    if ($('#b1').text() == 'Show Spoiler') {
        $('#b1').text('Hide Spoiler');
    } else if ($('#b1').text() == 'Hide Spoiler') {
        $('#b1').text('Show Spoiler');
    }

});

var $b1 = $('#b1')
  , $p1 = $('#p1')
  , hideText = 'Hide Spoiler'
  , showText = 'Show Spoiler'

$b1.on('click',function() {
    var text = $b1.text()
      , newText = text === showText ? hideText : showText
    $p1.toggle('blind')
    $b1.text(newText)
})

$('.spoiler-trigger').on('click',function() {
    var $this = $(this)
      , $thisSpoiler = $this.siblings('.spoiler').eq(0)
      , text = $this.text()
      , newText = text === showText ? hideText : showText
    $thisSpoiler.toggle('blind')
    $this.text(newText)
})

$("#b1").click(function () {
      $("#p1").toggle('slow');
    });