Hi you
to solve your issue, please try with my way:
open templates/ja_rasite/css/template.css file, find following code section:
/* Main Nav ---*/
#ja-mainnav {
background: url(../images/mainnav-bg.gif) repeat-x left top;
font-family: Tahoma, Verdana, Tahoma, sans-serif;
height: 46px;
line-height: 1;
padding-top: 10px;
position: absolute;
top: 0;
z-index: 900;
}
you create other image background with your static width and then replate mainnav-bg.gif image, change repeat-x to no-repeat, left top to center top.
The below is result:
/* Main Nav ---*/
#ja-mainnav {
background: url(../images/your_background_image .gif) no-repeat center top;
font-family: Tahoma, Verdana, Tahoma, sans-serif;
height: 46px;
line-height: 1;
padding-top: 10px;
position: absolute;
top: 0;
z-index: 900;
}