使用border-image: yourimage属性来设置你的图像，并将其放大到屏幕或窗口的整个边界。

使用border-image: yourimage属性来设置你的图像，并将其放大到屏幕或窗口的整个边界。

在CSS3中使用background-size属性:

.class {
     background-image: url(bg.gif);
     background-size: 100%;
}

编辑:Modernizr支持检测背景大小支持。您可以使用编写的JavaScript解决方案来工作，无论您需要它，并在不支持时动态加载它。这将保持代码的可维护性，而无需诉诸于某些浏览器的侵入性CSS hack。

就我个人而言，我使用jQuery脚本来处理它，它是imgsizer的一个改编。正如我现在所做的大多数设计一样，我在设备之间使用宽度%的流体布局，其中一个循环有轻微的适应(考虑到大小并不总是100%):

for (var i = 0; i < images.length; i++) {
    var image = images[i],
        width = String(image.currentStyle.width);

    if (width.indexOf('%') == -1) {
        continue;
    }

    image.origWidth = image.offsetWidth;
    image.origHeight = image.offsetHeight;

    imgCache.push(image);
    c.ieAlpha(image);
    image.style.width = width;
}

编辑: 你可能也对jQuery CSS3 Finaliz[s]e感兴趣。

试试这个

http://jsfiddle.net/5LZ55/4/

body
{ 
    background: url(http://p1.pichost.me/i/40/1639647.jpg) no-repeat fixed; 
    background-size: cover;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
}

定义“延伸和规模”…

If you've got a bitmap format, it's generally not great (graphically speaking) to stretch it and pull it about. You can use repeatable patterns to give the illusion of the same effect. For instance if you have a gradient that gets lighter towards the bottom of the page, then you would use a graphic that's a single pixel wide and the same height as your container (or preferably larger to account for scaling) and then tile it across the page. Likewise, if the gradient ran across the page, it would be one pixel high and wider than your container and repeated down the page.

通常，当容器增大或缩小时，为了给人一种它拉伸填充容器的错觉，您可以使图像比容器更大。任何重叠都不会显示在容器的边界之外。

If you want an effect that relies on something like a box with curved edges, then you would stick the left side of your box to the left side of your container with enough overlap that (within reason) no matter how large the container, it never runs out of background and then you layer an image of the right side of the box with curved edges and position it on the right of the container. Thus as the container shrinks or grows, the curved box effect appears to shrink or grow with it - it doesn't in fact, but it gives the illusion that is what's happening.

至于真正让图像随着容器一起缩小和增大，您需要使用一些分层技巧来使图像看起来像一个背景，并使用一些javascript来调整它与容器的大小。目前没有办法用CSS做到这一点…

如果你使用矢量图形，恐怕就超出了我的专业领域。

.style1 {
        background: url(images/bg.jpg) no-repeat center center fixed;
        -webkit-background-size: cover;
        -moz-background-size: cover;
        -o-background-size: cover;
        background-size: cover;
}

适用于:

Safari 3 + Chrome无论+ IE 9 + Opera 10+ (Opera 9.5支持背景大小，但不支持关键字) Firefox 3.6+ (Firefox 4支持非供应商前缀版本)

此外，您可以尝试使用ie解决方案

    filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='.myBackground.jpg', sizingMethod='scale');
    -ms-filter: "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='myBackground.jpg', sizingMethod='scale')";
    zoom:1;

这篇文章的作者是Chris Coyier http://css-tricks.com/perfect-full-page-background-image/