An Introduction to HTML: Lines
<HR> (Horizontal Rule) is a stand alone tag that generates a horizontal line. There is no corresponding HTML command for a verticle line. It is common to use lines (sizes 2 and 4 are especially common) to separate the main body of the document from the header and the footer of the document.
<hr>
<hr size=2>
<hr size=3>
<hr size=4>
<hr size=5>
<hr size=6>
<hr size=7>
<hr size=8>
<hr size=9>
<hr size=10>
<hr size=20>
<hr size=50>
You can also limit the length of the lines:
<hr width=75%>
<hr width=50%>
<hr width=35%>
<hr width=20%>
<hr width=15% size=80>