U.Helper

function toggleblock (id) {
cook = $.cookie("hideblock");
cook = cook.split('.');
newcook = '';
divid = id + 1;
if (cook[id] == 1) {cook[id] = 0;$('.icon_show_hide'+divid).attr("src","/modern_cat_minus.gif");} else {cook[id] = 1;$('.icon_show_hide'+divid).attr("src","/modern_cat_plus.gif");}
for (i=0; i<=cook.length-2; i++){newcook += cook[i] + '.'; }
$.cookie("hideblock", newcook);
$('#block'+divid).slideToggle("slow");
}

function tb () {
if ($.cookie("hideblock") = none) {$.cookie("hideblock", "0.0.0.0.0.0.0.0.0.0.0.0.0.");}
fff = $.cookie("hideblock");
fff = fff.split('.');
for (i=1; i<=fff.length-2; i++){if (fff[i-1]==1) { $('#block'+i).hide(); $('.icon_show_hide'+i).attr("src","/modern_cat_plus.gif");} }
}

tb();

onclick="toggleblock(0);" //для первого блока. для 2ого не 0, а 1 и т.д.

<img src="/modern_cat_minus.gif" class="icon_show_hide1" onclick="toggleblock(0);" title="Развернуть блок">
<div id="block1">
lolololo
</div>

$('.icon_show_hide'+divid).attr("src","/modern_cat_minus.gif");