Integrate all background images into one image to reduce the number of image server requests

It seems that this method is becoming more and more popular now. In the past, everyone cut the background into a single small image and use the background to define them one by one. In this way, when the page is opened, each small image will also be loaded, however, in this way, all small images are concentrated in one graph. when defining the background, the coordinates are used for positioning, and the height and width restrictions are combined to achieve the same effect. The benefits are: although the total number of K downloads does not change significantly, the number of image requests is significantly reduced.

Let's just look at it.CodeRight:

<Style type = "text/CSS">
. Bg1 {Background: url(bg_v.png) No-repeat 0 0; padding-left: 20px ;}
. Bg2 {Background: url(bg_v.png) No-repeat 0-20px; padding-left: 20px ;}
. Bg3 {Background: url(bg_v.png) No-repeat 0-40px; padding-left: 20px ;}
. Bg4 {Background: url(bg_v.png) No-repeat 0-60px; padding-left: 20px ;}
. Bg5 {Background: url(bg_v.png) No-repeat 0-80px; padding-left: 20px ;}
</Style>
<A href = "#" class = "Bg1"> Bg1 </a>
<A href = "#" class = "bg2"> bg2 </a>
<A href = "#" class = "bg3"> bg3 </a>
<A href = "#" class = "bg4"> bg4 </a>
<A href = "#" class = "bg5"> bg5 </a>
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