一个DIV背景图片不能显示的问题

为什么我的DIV背景图片不显示
HTML代码如下：
<div id="right">
        <div id="search_top">search</div>
        <div id="search_content">
            <br />
            <br />
            <br />
        </div>
        <div id="search_bottom"></div>
</div>

CSS代码如下：
#right {
margin-top: 50px;
margin-right:15px;
float: right;
height: 100px;
position:inherit;
}
#search_top{
background:url(image/search_top.jpg) no-repeat;
text-align: center;
}
#search_content{
width:220px;  
padding:10px;
background:url(image/search_content.jpg) repeat-y;
}
#search_bottom{
background:url(image/search_bottom.jpg) no-repeat;
}