Código:

.contract,.expand{background:url(http://2img.net/i/fa/m/tabs_more1.gif);cursor:pointer;height:9px;position:absolute;right:10px;top:6px;width:9px}
.contract{background:url(http://2img.net/i/fa/m/tabs_less1.gif);
opacity:0.65;
-moz-opacity: 0.65;
filter: alpha(opacity=65);}

Código:

$(function(){
 $('.main .main-head').click(function(){
 $('.main .main-head).css("opacity", "0.65");
});
});

Não modifique nada por gentileza.

Até.

jQuery(document).ready(function(){var p=0,u='IMAGEM_FECHAR',v='IMAGEM_ABRIR';jQuery('#main .main .main-head').each(function(){jQuery(this).next().attr('id',p);jQuery(this).next().css('display',my_getcookie('cat-'+jQuery(this).next().attr('id')));jQuery(this).append('<img src="'+u+'" id="abrirf" style="float: right;margin-right: 10px;margin-top: -20px;"/>');jQuery(this).find('#abrirf').click(function(){var i=jQuery(this).closest('.main-head').next();if(i.css('display')=='none'){i.slideToggle();jQuery(this).attr('src',u);my_setcookie('cat-'+jQuery(this).closest('.main-head').next().attr('id'),'block',1,0);}else{i.slideToggle();jQuery(this).attr('src',v);my_setcookie('cat-'+jQuery(this).closest('.main-head').next().attr('id'),'none',1,0);}});p++;});});

Até mais,
Passar bem.