How to design a CSS for a centered floating confirm dialog?

Question

I\'m looking for a way to display a confirm dialog that\'s always centered on the page, and floating over the page.

Tried that, but it\'s not \'always centered\' at

Answer 1

Try using this CSS

#centerpoint {
    top: 50%;
    left: 50%;
    position: absolute;
}

#dialog {
    position: relative;

    width: 600px;
    margin-left: -300px;

    height: 400px;
    margin-top: -200px;
}

#centerpoint should be the container div of the dialog

Note that the #centerpoint DIV should be inside the body element or inside elements that don't have a position: relative; property