.image {
float: right;
width: 400px; /* all of my thumbnails are 150px wide */
margin: 0 0 10px 10px;
background-color: #eee;
padding: 10px;
border: 1px solid #666;
}

.captionright {
clear: right;
float: right;
margin: 0;
text-align:center;
}
.image {
float: right;
width: 400px; /* all of my thumbnails are 150px wide */
margin: 0 0 10px 10px;
background-color: #eee;
padding: 10px;
border: 1px solid #666;
}

.image350 {
float: right;
width: 350px; /* all of my thumbnails are 150px wide */
margin: 0 0 10px 10px;
background-color: #eee;
padding: 10px;
border: 1px solid #666;
}

.image300 {
float: right;
width: 300px; /* all of my thumbnails are 150px wide */
margin: 0 0 10px 10px;
background-color: #eee;
padding: 10px;
border: 1px solid #666;
}

.image500 {
float: centre;
width: 500px; /* all of my thumbnails are 150px wide */
margin: 0 0 10px 10px;
background-color: #eee;
padding: 10px;
border: 1px solid #666;
}
.captionright {
clear: right;
float: right;
margin: 0;
text-align:center;
} 
  
.captioncenter {
clear: center;
float: center;
margin: 0;
text-align:center;
}