Here is my CSS code for the menu:

Code:
ul#css3menu,ul#css3menu ul{
        margin:0;list-style:none;padding:0;background-color:#FFFFFF;border-width:1px;border-style:solid;border-color:#5f5f5f;-moz-border-radius:0px;-webkit-border-radius:0px;border-radius:0px;}
ul#css3menu ul{
        display:none;position:absolute;left:0;top:100%;-moz-box-shadow:3.5px 3.5px 5px #000000;-webkit-box-shadow:3.5px 3.5px 5px #000000;box-shadow:3.5px 3.5px 5px #000000;padding:0 10px 10px;background-color:#05A2EA;border-radius:0px;-moz-border-radius:0px;-webkit-border-radius:0px;border-color:#d4d4d4;}
ul#css3menu li:hover>*{
        display:block;}
ul#css3menu li:hover{
        position:relative;}
ul#css3menu ul ul{
        position:absolute;left:100%;top:0;}
ul#css3menu{
        display:block;font-size:0;float:left;}
ul#css3menu li{
        display:block;white-space:nowrap;font-size:0;float:left;}
ul#css3menu>li,ul#css3menu li{
        margin:0;}
ul#css3menu a:active, ul#css3menu a:focus{
        outline-style:none;}
ul#css3menu a{
        display:block;vertical-align:middle;text-align:left;text-decoration:none;font:bold 13px Verdana;color:#FFFFFF;text-shadow:#FFF 0 0 1px;cursor:pointer;padding:10px;background-color:#05A2EA;background-image:url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAADICAYAAAAp8ov1AAAAAXNSR0IArs4c6QAAAAZiS0dEAAAAAAAA+UO7fwAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9oJGA41KpTYroIAAACASURBVCjP7ZE7DsJADESfJiL37znNXoJLUNARa7Ni6Bw5AtFEqXAx8vj/wfZNwBBAakPAWukQEJUu1RGVLt9su4yo9eJ3t0FrDWyTg58HezlujFPE9lXAQ8BdQM93R9LtM2ve/vnB22tcF/DaTpItJwHKVWcBk4BLwlw1/nAUvAGm30u0udPq+QAAAABJRU5ErkJggg==");background-repeat:repeat;background-position:0 0;border-width:0 0 0 1px;border-style:solid;border-color:#C0C0C0;}
ul#css3menu ul li{
        float:none;margin:10px 0 0;}
ul#css3menu ul a{
        text-align:left;padding:4px;background-color:#05A2EA;background-image:none;border-width:0;border-radius:0px;-moz-border-radius:0px;-webkit-border-radius:0px;font:14px Verdana;color:#000000;text-decoration:none;}
ul#css3menu li:hover>a{
        background-color:#05A2EA;border-color:#C0C0C0;border-style:solid;font:bold 13px Verdana;color:#FFFFFF;text-decoration:none;text-shadow:#FFF 0 0 1px;background-image:url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAADICAYAAAAp8ov1AAAAAXNSR0IArs4c6QAAAAZiS0dEAAAAAAAA+UO7fwAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9oJGA41KpTYroIAAACASURBVCjP7ZE7DsJADESfJiL37znNXoJLUNARa7Ni6Bw5AtFEqXAx8vj/wfZNwBBAakPAWukQEJUu1RGVLt9su4yo9eJ3t0FrDWyTg58HezlujFPE9lXAQ8BdQM93R9LtM2ve/vnB22tcF/DaTpItJwHKVWcBk4BLwlw1/nAUvAGm30u0udPq+QAAAABJRU5ErkJggg==");background-position:0 100px;}
ul#css3menu img{
        border:none;vertical-align:middle;margin-right:10px;}
ul#css3menu img.over{
        display:none;}
ul#css3menu li:hover > a img.def{
        display:none;}
ul#css3menu li:hover > a img.over{
        display:inline;}
ul#css3menu span{
        display:block;overflow:visible;background-position:right center;background-repeat:no-repeat;padding-right:0px;}
ul#css3menu ul li:hover>a{
        background-color:#05A2EA;background-image:none;font:14px Verdana;color:#EFEFEF;text-decoration:none;}
ul#css3menu li.topfirst>a{
        height:21px;line-height:21px;border-radius:0px 0 0 0px;-moz-border-radius:0px 0 0 0px;-webkit-border-radius:0px;-webkit-border-top-right-radius:0;-webkit-border-bottom-right-radius:0;}
ul#css3menu li.topfirst:hover>a{
        line-height:21px;}
ul#css3menu li.topmenu>a{
        height:21px;line-height:21px;}
ul#css3menu li.topmenu:hover>a{
        line-height:21px;}
ul#css3menu li.toplast>a{
        height:21px;line-height:21px;border-radius:0 5px 5px 0;-moz-border-radius:0 5px 5px 0;-webkit-border-radius:0;-webkit-border-top-right-radius:5px;-webkit-border-bottom-right-radius:5px;}
ul#css3menu li.toplast:hover>a{
        line-height:21px;}
As you'll see on my site, The navbar doesn't fill the gap. I have an image called 'navbar_bg.png', which is the correct size for that gap. I want the same navbar, but with the background image to fill the space. Anyone?