#overlay 
    {
        position: fixed; /* Sit on top of the page content */
        display: none; /* Hidden by default */
        width: 100%; /* Full width (cover the whole page) */
        height: 100%; /* Full height (cover the whole page) */
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: rgba(0,0,0,0.5); /* Black background with opacity */
        z-index: 1000; /* Specify a stack order in case you're using a different order for other elements */
        cursor: pointer; /* Add a pointer on hover */
    }
    #text
    {
        position: absolute;
        top: 50%;
        left: 50%;
        font-size: 2em;
        color: white;
        transform: translate(-50%,-50%);
        -ms-transform: translate(-50%,-50%);
    }