How to add line seperators HTML

[samipk]

here is a small example i make in quick for you.

<style type="text/css">
#content{
    width: 400px;
}
#right {
    float: right;
}
#left {
    float:left;
}
</style>

<div id="content">


<div id="right">
Your right content here
</div>


<div id="left">
Left content here
</div>

</div>

basically Div content contains 2 divs (right and left).
you can set there margin etc in style.

thanks for this mate, few questions:
the <style> part will actually come in html or should i add to css???
also how to add seperator line?