Something

#header{
background-color:#FFFFFF;
font-size: 10px;	
border: 1px solid;
padding: 5px;
position: relative;
background-color: blue;
}

#top_form{
float: right;
background-color: red;

}

#top_form_post_listing{
display: inline;

background-color: green;
}

.top_form_elements{
margin:10px;

}

#logo{
float: left;
}

form
{
display: inline;
}

.clearer
{
clear: both;
}