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html:

<div class="box">领取红包</div>
<p class="main on">恭喜您获得300元红包抵用券</p>

css:

.box{width: 100px;height: 30px;background: #FA6A2F;text-align: center;line-height: 30px;border-radius: 10px;cursor: pointer;color: #fff;}
.on{display: none;}

js:

$(function() {

    $(\'.box\').on(\'click\',
    function() {
        var o = $(\'.main\');
        o.removeClass(\'on\');
    })

    $(\'.main\').on(\'click\',
    function() {
        var o = $(\'.main\');
        o.addClass(\'on\');
    })
})