CSS3加载等待动画（loading）

效果：

CSS样式表代码：

#errmsg {
    color: #ff0000;
    text-align: center;
    margin: 0px auto;
    line-height: 30px;
}

#colorfulPulse {
    width: 200px;
    height: 80px;
    margin: 0 auto;
    position: absolute;
    left: 50%;
    top: 50%;
    margin-top: -50px;
    margin-left: -50px;
}

    #colorfulPulse span {
        display: inline-block;
        width: 10px;
        height: 50px;
        animation-name: scale;
        -webkit-animation-name: scale;
        -moz-animation-name: scale;
        -ms-animation-name: scale;
        -o-animation-name: scale;
        animation-duration: 1.2s;
        -webkit-animation-duration: 1.2s;
        -moz-animation-duration: 1.2s;
        -ms-animation-duration: 1.2s;
        -o-animation-duration: 1.2s;
        animation-iteration-count: infinite;
        -webkit-animation-iteration-count: infinite;
        -moz-animation-iteration-count: infinite;
        -ms-animation-iteration-count: infinite;
        -o-animation-iteration-count: infinite;
    }

span.item-1 {
    background: #2ecc71;
}

span.item-2 {
    background: #3498db;
}

span.item-3 {
    background: #9b59b6;
}

span.item-4 {
    background: #e67e22;
}

span.item-5 {
    background: #c0392b;
}

span.item-6 {
    background: #e74c3c;
}

span.item-7 {
    background: #e74c8c;
}

.item-1 {
    animation-delay: -1s;
    -webkit-animation-delay: -1s;
    -moz-animation-delay: -1s;
    -ms-animation-delay: -1s;
    -o-animation-delay: -1s;
}

.item-2 {
    animation-delay: -0.9s;
    -webkit-animation-delay: -0.9s;
    -moz-animation-delay: -0.9s;
    -ms-animation-delay: -0.9s;
    -o-animation-delay: -0.9s;
}

.item-3 {
    animation-delay: -0.8s;
    -webkit-animation-delay: -0.8s;
    -moz-animation-delay: -0.8s;
    -ms-animation-delay: -0.8s;
    -o-animation-delay: -0.8s;
}

.item-4 {
    animation-delay: -0.7s;
    -webkit-animation-delay: -0.7s;
    -moz-animation-delay: -0.7s;
    -ms-animation-delay: -0.7s;
    -o-animation-delay: -0.7s;
}

.item-5 {
    animation-delay: -0.6s;
    -webkit-animation-delay: -0.6s;
    -moz-animation-delay: -0.6s;
    -ms-animation-delay: -0.6s;
    -o-animation-delay: -0.6s;
}

.item-6 {
    animation-delay: -0.5s;
    -webkit-animation-delay: -0.5s;
    -moz-animation-delay: -0.5s;
    -ms-animation-delay: -0.5s;
    -o-animation-delay: -0.5s;
}

.item-7 {
    animation-delay: -0.4s;
    -webkit-animation-delay: -0.4s;
    -moz-animation-delay: -0.4s;
    -ms-animation-delay: -0.4s;
    -o-animation-delay: -0.4s;
}

@-webkit-keyframes scale {
    0%, 40%, 100% {
        -moz-transform: scaleY(0.2);
        -ms-transform: scaleY(0.2);
        -o-transform: scaleY(0.2);
        -webkit-transform: scaleY(0.2);
        transform: scaleY(0.2);
    }

    20%, 60% {
        -moz-transform: scaleY(1);
        -ms-transform: scaleY(1);
        -o-transform: scaleY(1);
        -webkit-transform: scaleY(1);
        transform: scaleY(1);
    }
}

@-moz-keyframes scale {
    0%, 40%, 100% {
        -moz-transform: scaleY(0.2);
        -ms-transform: scaleY(0.2);
        -o-transform: scaleY(0.2);
        -webkit-transform: scaleY(0.2);
        transform: scaleY(0.2);
    }

    20%, 60% {
        -moz-transform: scaleY(1);
        -ms-transform: scaleY(1);
        -o-transform: scaleY(1);
        -webkit-transform: scaleY(1);
        transform: scaleY(1);
    }
}

@-ms-keyframes scale {
    0%, 40%, 100% {
        -moz-transform: scaleY(0.2);
        -ms-transform: scaleY(0.2);
        -o-transform: scaleY(0.2);
        -webkit-transform: scaleY(0.2);
        transform: scaleY(0.2);
    }

    20%, 60% {
        -moz-transform: scaleY(1);
        -ms-transform: scaleY(1);
        -o-transform: scaleY(1);
        -webkit-transform: scaleY(1);
        transform: scaleY(1);
    }
}

@keyframes scale {
    0%, 40%, 100% {
        -moz-transform: scaleY(0.2);
        -ms-transform: scaleY(0.2);
        -o-transform: scaleY(0.2);
        -webkit-transform: scaleY(0.2);
        transform: scaleY(0.2);
    }

    20%, 60% {
        -moz-transform: scaleY(1);
        -ms-transform: scaleY(1);
        -o-transform: scaleY(1);
        -webkit-transform: scaleY(1);
        transform: scaleY(1);
    }
}

.loading {
    background: black;
    filter: alpha(Opacity=80);
    -moz-opacity: 0.8;
    opacity: 0.8;
    height: 100%;
    width: 100%;
    position: fixed;
    z-index: 1;
    margin-top: 0;
    top: 0;
}

.loading-center {
    width: 100%;
    height: 100%;
    position: relative;
}

javascript 代码:

var loadingHtml = //加载动画
"<div class='loading' style='z-index:99999999;display:none;'>" +
"    <div class='loading-center'>" +
"        <div id='colorfulPulse'>" +
"            <span class='item-1'></span>" +
"            <span class='item-2'></span>" +
"            <span class='item-3'></span>" +
"            <span class='item-4'></span>" +
"            <span class='item-5'></span>" +
"            <span class='item-6'></span>" +
"            <span class='item-7'></span>" +
"        </div>" +
"    </div>" +
"</div>";
$('.loading').show();