header {
    width: 100%;
    height: 50px;
    position: fixed;
    top: 0;
    font-family: "微软雅黑";
    background-color: #2795D8;/*#005397*/
    z-index: 999;
    left: 0px;
    max-width:720px;
}

.zjtitle {
    width: 100%;
    height: 50px;
    line-height: 50px;
    color: #fff;
    font-size: 20px;
    text-align: center;
}

.titlback {
    width: 50px;
    background: url(../images/leftArrow.png) no-repeat 10px center;
    float: left;
    height: 50px;
    position: absolute;
    top: 0px;
    left: 0px;
}

.titlehome {
    width: 50px;
    background: url(../images/home.png) no-repeat center center;
    float: right;
    height: 50px;
    position: absolute;
    top: 0px;
    right: 0px;
}