纯CSS3实现多种不同的等待效果(无js/jquery/无图片

<div class="loading"></div>

.loading
{
width:0;
height:0;
border-right:20px solid #3399ff;
border-:20px solid red;
border-left:20px solid yellow;
border-bottom:20px solid green;
border-radius: 20px;
-moz-border-radius: 20px;
-webkit-border-radius: 20px;
}

.loading {
/ Animate and rotate the spinner using CSS3 Animations /
animation: bganim 0.6s linear 0s infinite;
/ moz: Vendor prefixe for Mozilla Firefox /
-moz-animation: bganim 0.6s linear 0s infinite;
/ webkit: Vendor prefixe for Google Chrome, Chromium, Apple Safari... /
-webkit-animation: bganim 0.6s linear 0s infinite;
}
@keyframes bganim {
/ Rotate the div 360° /
from { transform:rotate(0deg); } to { transform:rotate(360deg); }
}
@-moz-keyframes bganim {
from { -moz-transform:rotate(0deg); } to { -moz-transform:rotate(360deg); }
}
@-webkit-keyframes bganim {
from { -webkit-transform:rotate(0deg); } to { -webkit-transform:rotate(360deg); }
}

.loading {
height:5px;
width:40px;
background-color:#000000;
}

.loading {
/ This is a CSS half cicle /
height:20px;
width:40px;
border-radius: 0 0 90px 90px;
-moz-border-radius: 0 0 90px 90px;
-webkit-border-radius: 0 0 90px 90px;
background:gray;
}

.loading {
width:0;
height:0;
border-right:20px solid #444;
border-:20px solid #777;
border-left:20px solid #aaa;
border-bottom:20px solid #eee;
border-radius: 20px;
-moz-border-radius: 20px;
-webkit-border-radius: 20px;
}

.loading {
width:0;
height:0;
border-right:20px solid #fff;
border-:20px solid #000;
border-left:20px solid #fff;
border-bottom:20px solid #000;
border-radius: 20px;
-moz-border-radius: 20px;
-webkit-border-radius: 20px;
}