div 画糖葫芦效果：
关键的属性：position:absolute;
<div id="container" style="width:500px">
<div style="position:absolute; left:30px; top:50px; background:#F00; width:1px; height:200px">
</div>
<div style="position:absolute; left:20px;top:80px; background:#FF0; width:20px;height:20px;border-radius:100px; border:1px solid #808080; text-align:center; float:left; ">
1
</div>
<div style="position:absolute; left:20px;top:120px; background:#FF0; width:20px;height:20px;border-radius:100px; border:1px solid #808080; text-align:center; float:left; ">
2
</div>
<div style="position:absolute; left:20px;top:160px; background:#FF0; width:20px;height:20px;border-radius:100px; border:1px solid #808080; text-align:center; float:left; ">
3
</div>
<div style="position:absolute; left:20px;top:200px; background:#FF0; width:20px;height:20px;border-radius:100px; border:1px solid #808080; text-align:center; float:left; ">
4
</div>
</div>
html_div笔记