trang trí box hiển thị bằng css

Xem DEMO

HTML code

<div id="container">     
        <h1> My Heading <span class="arrow"></span> </h1>        
</div>

CSS

#container {
    background: #666;
    margin: auto;
    width: 500px;
    height: 700px;
    padding-top: 30px;
    font-family: helvetica, arial, sans-serif;
    }

h1 {
     background: #e3e3e3;
     background: -moz-linear-gradient(top, #e3e3e3, #c8c8c8);
     background: -webkit-gradient(linear, left top, left bottom, from(#e3e3e3), to(#c8c8c8));
     padding: 10px 20px;
     margin-left: -20px;
     margin-top: 0;
     position: relative;
     width: 70%;

    -moz-box-shadow: 1px 1px 3px #292929;
    -webkit-box-shadow: 1px 1px 3px #292929;

    color: #454545;
    text-shadow: 0 1px 0 white;
}

.arrow {
     width: 0; height: 0;
     line-height: 0;
     border-left: 20px solid transparent;
     border-top: 10px solid #c8c8c8;
     top: 104%;
     left: 0;
     position: absolute;
}

Fixed trên IE ta ta thêm vào đoạn code dưới đây

<!--[if IE]>
        <style>
            .arrow { top: 100%; }
        </style>
<![endif]-->