Salve a tutti, ho trovato un bel javascript per una galleria fotografica, si chiama pirobox, devo pero' cambiare il css, ossia devo far si che il box che contiene l'immagine ingrandita sia piu' grande di quello impostato ma non riesco a farlo, mi potete aiutare. Dovrebbe essere nell'ultima parte di codice, cmq lo metto tutto.
grazie

.bg_thumbs{
background:#000;/*::::: you can change overlay background-color here ::::::::*/
position:fixed!important;
position:absolute;
top:0;
left:0!important;
left:-17px;
width:100%;
margin:0;
padding:0;
visibility:hidden;
z-index:1001;
display:none;
}

.unloader, .img_box{
background:#000;/*::::: you can change img_box background-color here ::::::::*/
}

/*:::: YOU DON'T NEED TO CHANGE NOTHING ELSE IN THE CSS :::*/

/*:::: PREV/NEXT inside rules ::::*/
.box_next_in{position:absolute;top:0;height:90%;wi dth:74px;right:0;overflow:hidden;z-index:1010;background:none;display:block;}
a.next_in{position:absolute;z-index:1011;height:100%;width:74px;right:-74px;text-indent:-999em;display:block;background:url(../img/next_tt.gif) top right no-repeat;}
a:hover.next_in{background:url(../img/next_tt.gif) top right no-repeat!important;background:url(../img/next_tt.gif) center right no-repeat;}
.box_previous_in{position:absolute;top:0;z-index:100012;height:90%;left:0;width:74px;overflow :hidden;background:none;display:block;}
a.previous_in{position:absolute;z-index:100013;left:-74px;height:100%;width:74px;text-indent:-999em;display:block;background:url(../img/prev_tt.gif) top left no-repeat;}
a:hover.previous_in{background:url(../img/prev_tt.gif) top left no-repeat!important;background:url(../img/prev_tt.gif) center left no-repeat;}

/*:::: PREV/NEXT outside rules ::::*/

.box_next{position:fixed!important;position:absolu te;top:50%;margin-top:-9px;height:18px;width:81px;right:0px!important;rig ht:16px;overflow:hidden;z-index:1006;}
a.next{position:fixed!important;position:absolute; text-indent:-999em;display:block;height:18px;width:81px;right:-81px;z-index:1007;background:url(../img/next_t_h.gif) center right no-repeat;}
a:hover.next{background:url(../img/next_t.gif) center right no-repeat;}
.box_previous{position:fixed!important;position:ab solute;top:50%;margin-top:-9px;left:0;height:18px;width:81px;overflow:hidden; z-index:1008;}
a.previous{z-index:1009;position:fixed!important;position:absol ute;width:81px;left:-81px;text-indent:-999em;display:block;height:18px;background:url(../img/prev_t_h.gif) center left no-repeat;}
a:hover.previous{background:url(../img/prev_t.gif) center left no-repeat;}

/*:::: END PREV/NEXT rules ::::*/


/*:::: IMG_BOX rules ::::*/

.img_box{position:fixed!important;position:absolut e;top:50%;left:50%;margin-top:-18px;margin-left:-25px;width:50px;height:50px;border:solid 1px;padding:2px!important;padding:1px;z-index:1002;visibility:hidden; overflow:hidden;}
.img_box img{position:relative;top:0;left:0;border:none;pad ding:0;z-index:1003;}

/*:::: END IMG_BOX rules ::::*/

/*:::: CLOSE, LOADING rules ::::*/

.thumbs_close{position:absolute;bottom:0;right:0;h eight:18px;width:81px;color:#fff;cursorointer;margin:0 5px 5px 0!important;margin:0 5px 3px 0;z-index:100014;background:url(../img/close_t.gif) center right no-repeat!important;background:url(../img/close_t.gif) center right no-repeat;visibility:hidden;}
.loader{position:fixed!important;position:absolute ;top:50%;left:50%;margin-top:-18px!important;margin-left:-22px!important;margin-top:-15px;margin-left:-20px;width:50px;height:50px;display:block;z-index:1007;}
.loader img{border:none;padding:0!important;padding:0;back ground:none;}
.unloader{visibility:visible;}
.thumbs{visibility:hidden;}

.caption{ background:#000;position:absolute;bottom:0;left:0; margin:0 0 3px 3px!important;margin:0 0 1.5px 2px; color:#fff;visibility:hidden;display:block; padding:3px; z-index:100013; cursor:text}
.caption p{ margin:0;padding:0; margin-right:82px; }
.pre{visibility:hidden;display:none;}
.end{display:none;}
.begin{display:none;}

/*:::: DEMO PAGE, LIST IMAGES rules (REMOVE OR CHANGE) ::::*/

.gallery{
float:left;
padding:0;
margin:0;
width:930px;
height:100%!important;
height:auto;
padding:5px;
}
.gallery ul{float:left;padding:0;margin:0!important;margin: 0;}
.gallery img{
margin:0;
padding:2px;
height:139px;
width:200px;
}
.gallery li{float:left;height:151px;width:212px;margin:10px !important;margin:5px;}
.gallery li a{float:left;height:143px;width:204px;border:2px solid #333;}
.gallery li a:hover{float:left;height:143px;width:204px;border :2px solid #000;}
.gallery_in{float:left;padding:0;margin:0;width:93 0px;height:100%!important;height:auto;padding:5px; }
.gallery_in ul{float:left;padding:0;margin:0!important;margin: 0;}
.gallery_in img{margin:0;padding:2px;height:139px;width:200px; }
.gallery_in li{float:left;height:151px;width:212px;margin:10px !important;margin:5px;}
.gallery_in li a{float:left;height:143px;width:204px;border:2px solid #333;}
.gallery_in li a:hover{float:left;height:143px;width:204px;border :2px solid #000;}