Unable to set full page width of css menu bar - html

Question

I am using this tutorial for a css menu online and it works perfectly, but it does not stretch the full width of the page: http://www.red-team-design.com/css3-animated-dropdown-menu
Here is what it looks like:
I tried changing the width: 100% and that helped extend it but not full width. I even did what this user did Here but that did not work either. This needs to work on IE 8 as well as firefox so that is bringing up more issues there.
#menu, #menu ul {
margin: 0;
padding: 0;
list-style: none;
}
#menu {
width: 960px;
margin: 60px auto;
border: 1px solid #222;
background-color: #111;
background-image: -moz-linear-gradient(#444, #111);
background-image: -webkit-gradient(linear, left top, left bottom, from(#444), to(#111));
background-image: -webkit-linear-gradient(#444, #111);
background-image: -o-linear-gradient(#444, #111);
background-image: -ms-linear-gradient(#444, #111);
background-image: linear-gradient(#444, #111);
-moz-border-radius: 6px;
-webkit-border-radius: 6px;
border-radius: 6px;
-moz-box-shadow: 0 1px 1px #777, 0 1px 0 #666 inset;
-webkit-box-shadow: 0 1px 1px #777, 0 1px 0 #666 inset;
box-shadow: 0 1px 1px #777, 0 1px 0 #666 inset;
}
#menu:before,
#menu:after {
content: "";
display: table;
}
#menu:after {
clear: both;
}
#menu {
zoom:1;
}
#menu li {
float: left;
border-right: 1px solid #222;
-moz-box-shadow: 1px 0 0 #444;
-webkit-box-shadow: 1px 0 0 #444;
box-shadow: 1px 0 0 #444;
position: relative;
}
#menu a {
float: left;
padding: 12px 30px;
color: #999;
text-transform: uppercase;
font: bold 12px Arial, Helvetica;
text-decoration: none;
text-shadow: 0 1px 0 #000;
}
#menu li:hover > a {
color: #fafafa;
}
*html #menu li a:hover { /* IE6 only */
color: #fafafa;
}
#menu ul {
margin: 20px 0 0 0;
_margin: 0; /*IE6 only*/
opacity: 0;
visibility: hidden;
position: absolute;
top: 38px;
left: 0;
z-index: 1;
background: #444;
background: -moz-linear-gradient(#444, #111);
background-image: -webkit-gradient(linear, left top, left bottom, from(#444), to(#111));
background: -webkit-linear-gradient(#444, #111);
background: -o-linear-gradient(#444, #111);
background: -ms-linear-gradient(#444, #111);
background: linear-gradient(#444, #111);
-moz-box-shadow: 0 -1px rgba(255,255,255,.3);
-webkit-box-shadow: 0 -1px 0 rgba(255,255,255,.3);
box-shadow: 0 -1px 0 rgba(255,255,255,.3);
-moz-border-radius: 3px;
-webkit-border-radius: 3px;
border-radius: 3px;
-webkit-transition: all .2s ease-in-out;
-moz-transition: all .2s ease-in-out;
-ms-transition: all .2s ease-in-out;
-o-transition: all .2s ease-in-out;
transition: all .2s ease-in-out;
}
#menu li:hover > ul {
opacity: 1;
visibility: visible;
margin: 0;
}
#menu ul ul {
top: 0;
left: 150px;
margin: 0 0 0 20px;
_margin: 0; /*IE6 only*/
-moz-box-shadow: -1px 0 0 rgba(255,255,255,.3);
-webkit-box-shadow: -1px 0 0 rgba(255,255,255,.3);
box-shadow: -1px 0 0 rgba(255,255,255,.3);
}
#menu ul li {
float: none;
display: block;
border: 0;
_line-height: 0; /*IE6 only*/
-moz-box-shadow: 0 1px 0 #111, 0 2px 0 #666;
-webkit-box-shadow: 0 1px 0 #111, 0 2px 0 #666;
box-shadow: 0 1px 0 #111, 0 2px 0 #666;
}
#menu ul li:last-child {
-moz-box-shadow: none;
-webkit-box-shadow: none;
box-shadow: none;
}
#menu ul a {
padding: 10px;
width: 130px;
_height: 10px; /*IE6 only*/
display: block;
white-space: nowrap;
float: none;
text-transform: none;
}
#menu ul a:hover {
background-color: #0186ba;
background-image: -moz-linear-gradient(#04acec, #0186ba);
background-image: -webkit-gradient(linear, left top, left bottom, from(#04acec), to(#0186ba));
background-image: -webkit-linear-gradient(#04acec, #0186ba);
background-image: -o-linear-gradient(#04acec, #0186ba);
background-image: -ms-linear-gradient(#04acec, #0186ba);
background-image: linear-gradient(#04acec, #0186ba);
}
#menu ul li:first-child > a {
-moz-border-radius: 3px 3px 0 0;
-webkit-border-radius: 3px 3px 0 0;
border-radius: 3px 3px 0 0;
}
#menu ul li:first-child > a:after {
content: '';
position: absolute;
left: 40px;
top: -6px;
border-left: 6px solid transparent;
border-right: 6px solid transparent;
border-bottom: 6px solid #444;
}
#menu ul ul li:first-child a:after {
left: -6px;
top: 50%;
margin-top: -6px;
border-left: 0;
border-bottom: 6px solid transparent;
border-top: 6px solid transparent;
border-right: 6px solid #3b3b3b;
}
#menu ul li:first-child a:hover:after {
border-bottom-color: #04acec;
}
#menu ul ul li:first-child a:hover:after {
border-right-color: #0299d3;
border-bottom-color: transparent;
}
#menu ul li:last-child > a {
-moz-border-radius: 0 0 3px 3px;
-webkit-border-radius: 0 0 3px 3px;
border-radius: 0 0 3px 3px;
}
Any help is appreciated!

Answer 1

The space is because of the default margin and padding for BODY Tag.
From the comment,
Add below css
body { margin: 0; padding: 0; }
And also remove margin and set width to 100% in the define style #menu
margin: 60px auto;
width: 960px;

Answer 2

set this in your style sheet
html,body{
width:100%;
height:100%;
margin:0
padding:0;
}
Why you need this ?? because when you set the container dimension in percentage, it always looks for its parents dimension to calculate its percentage value.....
if you set #cont width in percentage...then #cont width is dependent on body width,SO, for markup
<html>
<head></head>
<body>
<div id="cont">
</div>
</body>
</html>
with
#cont
{
width:80%
}
then it would mean that
#cont = 80% of body
so #cont would fail, if body has no width set.

Answer 3

It is because the body has a margin by default.
Remove the default by adding body { margin: 0px; } to your CSS (and the #menu { width: 100%; }) of course.

Answer 4

You can use this:
Body,ul,li{margin:0;padding:0}
#cont{
width:100%;
float:right;
height:120px;
}