CSS - how do i stretch the background of the menu - css

Question

Hello,
Can someone help me, how can i stretch the background of the menu (to be full width, from left to right)?
I'm a beginner.
Thanks.
#menu, #menu ul {
margin: 0;
padding: 0;
list-style: none;
}
#menu {
width:100%;
margin: 0px;
background-color: #3d56ac;
background-image: linear-gradient(#444, #111);
}
#menu:before,
#menu:after {
content: "";
display: table;
}
#menu:after {
clear: both;
}
#menu {
zoom:1;
}
#menu li {
float: left;
border-right: 1px solid #222;
box-shadow: 1px 0 0 #444;
position: relative;
}
#menu a {
float: left;
padding: 12px 30px;
color: #FFF;
text-transform: uppercase;
font: bold 12px Arial, Helvetica;
text-decoration: none;
text-shadow: 0 1px 0 #111;
}
#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: linear-gradient(#444, #111);
box-shadow: 0 -1px 0 rgba(255,255,255,.3);
border-radius: 3px;
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*/
box-shadow: -1px 0 0 rgba(255,255,255,.3);
}
#menu ul li {
float: none;
display: block;
border: 0;
_line-height: 0; /*IE6 only*/
box-shadow: 0 1px 0 #111, 0 2px 0 #666;
}
#menu ul li:last-child {
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: linear-gradient(#04acec, #0186ba);
}
#menu ul li:first-child > a {
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 {
border-radius: 0 0 3px 3px;
}

Answer 1

This should work:
#menu {
background-size: 100%;
}

Answer 2

You need to fix the width of the image... if your want to Stretch the background image...
**CSS**
background-image: url("menu.png");
background-size: 875px 125px;
background-repeat: no-repeat;
Hope this will helps you...
or you can try...
/css
body{margin: 0 auto;}
.menu100percent {
background: #3584b4; /* Old browsers */
background: -moz-linear-gradient(top, #3584b4 0%, #25567f 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#3584b4), color-stop(100%,#25567f)); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, #3584b4 0%,#25567f 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, #3584b4 0%,#25567f 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, #3584b4 0%,#25567f 100%); /* IE10+ */
background: linear-gradient(to bottom, #3584b4 0%,#25567f 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#3584b4', endColorstr='#25567f',GradientType=0 ); /* IE6-9 */
color: white;
font-size: 16px;
height: 37px;
width:100%;
}
.menu{width:1000px; margin: 0 auto; }
.menu a{color:#fff; font-size:12px; line-height:37px; font-family:Arial; text-decoration:none;}
/html
<div class="menu100percent">
<div class="menu">
Shop
</div>
</div>
DEMO HERE