J'ai seulement modifier le fichier theme.css

voila se que j'ai dans se fichier :

/* $Id: theme.css 1340 2006-06-04 10:15:29Z chrisaga $ */

/* text color */
BODY, H1, H3, DT {
  color:#e0e0e0;background-image: url(http://perso.orange.fr/pompierstjs//violet1.JPG);}

H2,#menubar DT, .throw {
  color: #0000ff;
}

#content .navigationBar {
  color: #aaaaaa;
}
#content .pageNumberSelected {
  color: #000000;
}

/* backgrounds */
BODY {
  background-color: #fffffF;color:#0000ff;
}

H3, #the_page, #imageHeaderBar, #imageToolBar A:hover, .row1  {
  background-image: url(http://perso.orange.fr/pompierstjs//violet1.JPG);
}

#menubar DL, #content, #imageToolBar {
  background-color: #ffffff;background-image:url(images/manga_70.gif);background-repeat: no-repeat;background-position : right;
} #content,#imageToolBar {background-image:none;}

H2, #menubar DT, .throw  {
  background-image: url(images/tableh1_bg.PNG);
}

#imageHeaderBar H2 {
  background-image: none;
  background-color: transparent;
  border: none;
}

#imageHeaderBar {
  background-image: url(images/tableh2_bg.PNG);
  background-repeat: repeat-x;
  background-position: left;
}

/* borders */
#menubar DL, #content,
#comments DIV.comment BLOCKQUOTE {
  border: 1px solid #FF00CC;
}

#imageHeaderBar {
  border-top: 1px solid #FF00CC;
}
H2, #menubar DT, #imageToolBar {
  border-bottom: 1px solid #FF00CC;
}

#theImage IMG {
  border:5px outset #FF00CC;
}

#content UL.thumbnail IMG {
  border: 1px solid #a0a0a0;
}

FIELDSET, INPUT, SELECT, TEXTAREA,
#content DIV.comment  A.illustration IMG, #infos,
#content DIV.thumbnailCategory {
  border: 1px solid #0000ff;
}

#comments DIV.comment BLOCKQUOTE {
  border-left: 2px solid #696969;
}

#content UL.thumbnails SPAN.wrap2 {
  border: 1px solid #0000ff;    /* thumbnails border color and style */
  -moz-border-radius: 4px;    /* round corners with Geko */
  border-radius: 4px 4px;    /* round corners with CSS3 compliant browsers */
}
#content UL.thumbnails SPAN.wrap2:hover {
  border-color: #FF00CC;        /* thumbnails border color when mouse cursor is over it */
}

/* links */
A, .rateButton {
  color: #9900FF;
}

A:hover {
  color: #FF33FF;
}

#imageToolBar A, #imageToolBar A:hover {
  border-bottom: none;
}

A.navThumb, A.navThumb:hover {
  border-bottom: none;
}

/* others */
.pleaseNote {
  background-image: url(images/tableh2_bg.PNG);
  color: #9900FF;
  padding: 1ex;
  font-weight: bold;
}
#the_page {
  border: 1px solid #e0e0e0;
  padding-top: 5px;
  padding-bottom:30px;
  text-align:center;
  display:block;
}

/*calendar elements*/
SPAN.calItemEmpty { color: silver; }

SPAN.calItem, SPAN.calItemEmpty
{
  border: 1px solid gray;
}

/* nice looking month calendar*/
TD.calDayCellEmpty, TD.calDayCellFull { border: 1px solid gray;}

TD.calDayCellEmpty { color: silver; }

.calBackDate { color: #000; }
.calForeDate { color: #fff; }

#menubar DD ul { list-style-image: url(images/bouton_007.gif);}