Center a H2 inside a div element

Question

I want to center h2 inside #top but vertical-align:middle doesn't work... I have no idea what to do!

#top {
    display: block;
    position: relative;
    height: 100px;
    background-color: rgba(89,144,222,.6);
}
#top h2{
    text-shadow: 2px 2px black;
    text-align: center;
    color: white;
    font-family:"Impact";
    font-size: 50px;
}

effect is - http://puu.sh/2mz5M

Answer 1

I see, you have height defined for div, which is great for this situation. You can do this:

#top h2{
    text-shadow: 2px 2px black;
    text-align: center;
    color: white;
    font-family:"Impact";
    font-size: 50px;
    line-height: 100px;
}