How to make divs stretch horizontally across the page using pixels and not percentage?

Question

基本上我不想使用百分比，因为像素更容易使用，因为我知道东西的确切尺寸，因此我想将页面宽度设置为1024像素宽，但可以拉伸以适合任何（大多数）常见分辨率

Answer 1

In modern browsers you can use @media

   @media only screen and (min-device-width: 800px) and (max-device-width: 1023px)  {
            #myDiv{width: 800px;}
    }

    @media only screen and (min-device-width: 1024px) and (max-device-width: 1279px)  {
            #myDiv{width: 1024px;}
    }

In old browsers use fixed size or make some js tricks.