/* Changes the color of the post meta-data fields during a onmouseover event 
PARAMETERS
section		the category of the post
data_field	the type of meta data (author or publication date)
img_name	the id of the divider to change
img_source 	the source of the new divider 
*/
function roll_over(data_field, img_name, img_src) {
   document[img_name].src = img_src;
   	el = document.getElementById(data_field);
   	el.className='label selected';
}

/* Returns to normal the color of the post meta-data fields during a onmouseout event
PARAMETERS
section		the category of the post
data_field	the type of meta data (author or publication date)
img_name	the id of the divider to change
img_source 	the source of the new divider 
*/
function roll_out(data_field, img_name, img_src) {
   document[img_name].src = img_src;
   el = document.getElementById(data_field);
   el.className='label unselected';
}