仿时光轴留言特效

css部分：

 <style>
        *{margin:0;padding:0}
        body{font-size:14px;font-family:"微软雅黑";background-attachment:fixed;z-index:0;background-size:100%;}
        .box{width:960px;height:2000px;margin:100px auto;position:relative;z-index:1;}

        /*内容发布区域*/
        .box .boxcenter{width:500px;height:200px;background:#fff;position:absolute;top:80px;left:180px;border:1px solid green;border-radius:6px;}
        .box .boxcenter .boxc_t{height:30px;line-height:30px;}
        .box .boxcenter .boxc_t h4{padding-left:20px;background:#3BBFB4;border-top-left-radius:6px;border-top-right-radius:6px;}
        .box .boxcenter .boxc_c{width:460px;height:100px;border:1px solid #A6C8FF;margin:8px auto;text-indent:10px;box-shadow:0 0 4px #A6C8FF;}
        .box .boxcenter .boxc_b{width:80px;height:30px;position:absolute;right:10px;bottom:8px;}
        .box .boxcenter .boxc_b a{font-size:14px;color:#fff;line-height:30px;background:#3bbfb4;border-radius:6px;display:block;text-align:center;text-decoration:none;}
        .box .boxcenter .boxc_b a:hover{background:#2C8E86;}
        .box .timeline{width:60px;height:100%;position:absolute;top:100px;left:80px;border-right:2px solid #5d7895;}/**/
        .timeline .timeline_t{width:50px;height:50px;border-radius:50%;border:1px solid #fff;background-size:100%;}
        .timeline .nextbox{width:380px;height:80px;position:absolute;top:260px;left:60px;}
        .a{width:380px;height:80px;background:#fff;border-radius:6px;margin-top:30px;font-size:16px;line-height:20px;text-indent:20px;word-break:break-all;position:relative;left:6px;}
        .a .b{width:6px;height:6px;border-radius:50%;border:2px solid #fff;background:#9DCFE1;position:absolute;top:35px;left:-10px;}
        #time{font-size:20px;color:#ababab;}
        #hour{font-size:12px;color:#92CADE;}
    </style>

html部分：

<div class="box">

    <!--内容发布区域-->
    <div class="boxcenter">
        <div class="boxc_t"><h4>随便说点什么吧...</h4></div>
        <div class="boxc_c" contenteditable="true" id="aa"></div>
        <div class="boxc_b"><a href="#">发布</a></div>
    </div>

    <!--时光轴线-->
    <div class="timeline">
        <div class="timeline_t">
        </div>
        <div class="nextbox"></div>
    </div>

</div>

js部分：（此处需要引入jquery.js）

<script type="text/javascript">
    $(function(){
        $(".box").find(".boxc_b").click(function(){
            var center = $(".boxc_c").text();//.appendTo("nextbox");
            if(center==""){
                alert("请输入内容喔！");
                return;
            }
            $(".nextbox").prepend("<div class='a'>"+
                    "<div class='b'></div>"+
                    "<span id='time'>"+year+"-"+
                    month+"-"+
                    day+"&nbsp;&nbsp;"+
                    "<span id='hour'>"+hour+":"+min+"</span>"+
                    "</span>"+
                    "<br>"+
                    "<p style='padding:4px'>"+center+"</p>"+
                    "</div>");
            $(".boxc_c").text("");
        });
        //alert(1);
        $(".boxc_c").keydown(function(event){
            var len =$(".boxc_c").text().length;
            if(len > 70){
                alert("够了，你别输入了，哪儿那么多话儿！");
            }
        });

        var dateDom = new Date();
        //获取本地时间，年月日时分
        var year = dateDom.getFullYear();
        var month = dateDom.getMonth()+1;
        var day = dateDom.getDate();
        var hour = dateDom.getHours();
        var min = dateDom.getMinutes();
    });
</script>