【博客美化】08.添加"扩大/缩小浏览区域大小" 按钮

<div id="divExpandViewArea" onclick="$('#mainContent').css({'margin-left':'0'});$('#sideBar').css({'display':'none'});">扩大</div>

<div id="divCollapseViewArea" onclick="$('#mainContent').css({'margin-left':'300px'});$('#sideBar').css({'display':'block'});">缩小</div>

#divExpandViewArea{
    position: fixed;
    color: white;
    /* border-radius: 10px; */
    padding: 2.5px 10px;
    right: 5px;
    top: 390px;
    cursor: pointer;
    opacity: 0.9;
    background-color: gray;
}

#divCollapseViewArea{
    position: fixed;
    color: white;
    /* border-radius: 10px; */
    padding: 2.5px 10px;
    right: 5px;
    top: 420px;
    cursor: pointer;
    opacity: 0.9;
    background-color: gray;
}