<hr/> 水平线样式

<hr style="width:490px;" />
<hr size=8 style="COLOR: #ffd306;border-style:outset;width:490px;color:#CCC">
<hr size=1 style="COLOR:#ff9999;border-style:double;width:490px;color:#CCC">
<hr size=1 style="color: blue;border-style:dotted;width:490px;color:#CCC">
<hr size=1 style="width:490px;height:3px;border:none;border-top:3px double red;">
<HR align=center width=1 color=red size=100>