Wie kann ich ein images in header ändern?

/* 
  Stylesheet for Wordpress v1.2
  Modifications by Katy (http://cathode-ray-coma.co.uk/)
  based on the original wp-layout.css
  
  http://wordpress.org/
  
  */
  
  a {
  	color: #909;
  	text-decoration: none;
  }
  
  a img {
  	border: none;
  }
  
  a:visited {
  	color: #c9c;
  }
  
  a:hover {
  	color: #c0c;
  	text-decoration: underline;
  }
  
  acronym, abbr {
  	border-bottom: 1px dashed #333;
  }
  
  acronym, abbr, span.caps {
  	cursor: help;
  	font-size: 90%;
  	letter-spacing: .07em;
  }
  
  blockquote {
  	border-left: 5px solid #ece;
  	font-family: arial, sans-serif;
  	margin-left: 1.5em;
  	padding-left: 5px;
  }
  
  body {
  	background: #F7EEF9;
  	font-family: Verdana, Arial, Helvetica, sans-serif;
  	color: #660099;
  	margin: 0;
  	padding: 0;
  }
  
  cite {
  	font-size: 90%;
  	font-style: italic;
  }
  
  code {
  
  }
  
  
  h1 {
  	color: #909;
  }
  
  
  h2 {
  	border-bottom: 1px dotted #ccc;
  	color: #909;
  	font: bold 95% arial, tahoma, sans-serif;
  	margin: 15px 0 2px 0;
  	padding-bottom: 2px;
  }
  
  h3 {
  	font-family: arial, tahoma, sans-serif;
  	margin-top: 0;
  }
  
  ol#comments li p {
  	font-size: 100%;
  }
  
  p, li, .feedback {
  	font: 80% Verdana, sans-serif;
  
  }
  
  /* classes used by the_meta() */
  ul.post-meta {
  	list-style: none;
  }
  
  ul.post-meta span.post-meta-key {
  	font-weight: bold;
  }
  
  .credit {
  	background: #909;
  	color: #fff;
  	font-size: 11px;
  	margin: 0 50px 0 50px;
  	padding: 5px;
  	text-align: center;
  }
  
  .credit a:link, .credit a:hover {
  	color: #fff;
  }
  
  .feedback {
  	text-align: right;
  	clear: both;
  }
  
  .meta {
  	font-size: .75em;
  }
  
  .meta li, ul.post-meta li {


  	display: inline;
  }
  
  .meta ul {
  	display: inline;
  	list-style: none;
  	margin: 0;
  	padding: 0;
  }
  
  .meta, .meta a { 
  	color: #c9c;
  	font-weight: normal;
  	letter-spacing: 0;
  }
  
  .storytitle {
  	margin: 0;
  }
  
  .storytitle a {
  	text-decoration: none;
  }
  
  #commentform {
  	margin-left: 50px;
  	padding: 5px;
  }
  
  
  #commentform #name, #commentform #email, #commentform #url, #commentform textarea, #commentform .textarea {
  	background: #fff;
  	border: 1px solid #909;
  	padding: .2em;
  }
  
  #commentform textarea {
  	width: 80%;
  }
  
  #commentlist li ul {
  	border-left: 1px solid #ddd;
  	font-size: 110%;
  	list-style-type: none;
  }
  
  #content {
  	padding: 10px;
  	padding-right: 50px;
  	margin-right: 12em;
  }
  
  #header {
  	background: #909;
  	font: normal 230% verdana, arial, tahoma, sans-serif;
  	height: 250px;
  	letter-spacing: 0.2em;
  	margin-top: 0;
  	text-align: center;	
	background-image: url('http://weinandy.net/judul3.gif');
       background-repeat: no-repeat;
  }
  
  #header a {
  	color: #fff;
  	text-decoration: none;
        height: 250px;
         display: block;
       padding-top:50px;
       padding-left:200px;
  }
  
  #header a:hover {
  	text-decoration: none;
  }
  
  #menu {


  	background: #fff;
  	border-left: 1px dotted #909;
  	padding: 20px 0 10px 30px;
  	position: absolute;
  	right: 51px;
  	top: 265px;
  	width: 11em;
  }
  
  #menu form {
  	margin: 0 0 0 13px;
  }
  
  #menu input#s {
  	width: 80%;
  	background: #fff;
  	border: 1px solid #909;
  	color: #000;
  }
  
  #menu ul {
  	color: #c9c;
  	font-weight: bold;
  	list-style-type: none;
  	margin: 0;
  	padding-left: 3px;
  }
  
  #menu ul li {
  	font:  normal 100% arial, tahoma, sans-serif;
  	letter-spacing: 0.1em;
  	margin-top: 10px;
  	padding-bottom: 2px; 
  	text-transform: lowercase;
  }
  
  #menu ul ul {
  	font-variant: normal;
  	font-weight: normal;
  	line-height: 100%;
  	list-style-type: none;
  	margin: 0;
  	padding: 0;
  	text-align: left;
  }
  
  #menu ul ul li {
  	border: 0;
  	font: normal normal 80%/115% arial, tahoma, Verdana, sans-serif;
  	letter-spacing: 0;
  	margin-top: 0;
  	padding: 0;
  	padding-left: 12px;
  	text-transform: none;
  }
  
  #menu ul ul li a { 	color: #909;
  	text-decoration: none;
  }
  
  #menu ul ul li a:hover {
  	border-bottom: 1px solid #cfc;
  }
  
  #menu ul ul ul.children {
  	font-size: 142%;
  	padding-left: 4px;
  }
  
  
  #rap {
  	background: #fff;
  	border: 1px solid #909;
  	margin: 10px 50px 0 50px;
  }
  
  
  #wp-calendar {
  	border: 1px solid #c9c;
  	empty-cells: show;
  	font-size: 14px;
  	margin: 0;
  	width: 90%;
  }
  
  #wp-calendar #next a {
  	padding-right: 10px;
  	text-align: right;
  }
  
  #wp-calendar #prev a {
  	padding-left: 10px;
  	text-align: left;
  }
  
  #wp-calendar a {
  	display: block;
  	text-decoration: none;
  }
  
  #wp-calendar a:hover {
  	background: #e0e6e0;
  	color: #333;
  }
  
  #wp-calendar caption {
  	color: #c9c;
  	font-size: 16px;
  	text-align: left;
  }
  
  #wp-calendar td {
  	color: #ccc;
  	font: normal 12px Verdana, sans-serif;
  	letter-spacing: normal;
  	padding: 2px 0;
  	text-align: center;
  }
  
  #wp-calendar td.pad:hover {
  	background: #fff;
  }
  
  #wp-calendar td:hover { 
  	background: #eee;
  	color: #bbb;
  }
  
  #wp-calendar #today {
  	background: #fef;
  	color: #909;
  }
  
  #wp-calendar th {
  	font-style: normal;
  	text-transform: capitalize;
  }