title: Changing a style parameter dynamically with Java in GWT
body: <p>By any chance is there a way to change/alter a style parameter with Java that is used with GWT. 
  Suppose if i have a component in ui.xml file as ui:field="DivUserNameTop" 
  and if i want to alter the color of the DIV 'DivUserNameTop' what property can i use? I tried some googling but nothing helped.</p>
  
  <p>TO MAKE IT MORE CLEAR - If suppose i have to load the color of the div from the session(i.e each user has each color pre-defined in a db and that value will be set in the session say SESSION_COLOR once they authenticate), how do i set the SESSION_COLOR to a DIV with GWT</p>