Hola que tal 
zerokilled, el countCheckboxes no lo puse anteriormente, pero lo invoco asi <div id="checkCount">0</div>, aqui esta el codigo completo    
Código HTML:
Ver original- <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
-   
-     <script type="text/javascript"> 
-     function countCheckboxes() 
-     { 
-             var form = document.getElementById('album'); 
-             var count = 0; 
-             for(var n = 0; n < form.length; n++) 
-             { 
-                 if(form[n].name == 'addAlbum[]' && form[n].checked) 
-                 { 
-                     count++; 
-                 } 
-             } 
-             document.getElementById('checkCount').innerHTML = count; 
-     } 
-   
-          
-         <script type="text/javascript"> 
- //This Function Creates your Cookie for you just pass in the Cookie Name, Value, and number of days before you want it to expire. 
- function CreateCookie(name,value,days) 
- { 
-     if (days) 
-     { 
-         var date = new Date(); 
-         date.setTime(date.getTime()+(days*24*60*60*1000)); 
-         var expires = "; expires="+date.toGMTString(); 
-     } 
-     else var expires = ""; 
-     document.cookie = name + "=" + value + expires + "; path=/"; 
- } 
-   
- //This Function reads the value of a given cookie for you.  Just pass in the cookie name and it will return the value. 
- function ReadCookie(name) 
- { 
-     var nameEQ = name + "="; 
-     var ca = document.cookie.split(';'); 
-     for(var i=0;i < ca.length;i++) { 
-         var c = ca[i]; 
-         while (c.charAt(0)==' ') c = c.substring(1,c.length); 
-         if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length); 
-     } 
-     return null; 
- } 
-   
- //This Function Erases Cookies.  Just pass in the name of the cookies you want erased. 
- function EraseCookie(name) 
- { 
-     CreateCookie(name,"",-1); 
- } 
-   
- //Sets or UnSets Cookies for given checkbox after it's been clicked on/off. 
- function ChangeBox(CheckBox) 
- { 
-     if (document.getElementById(CheckBox).checked) 
-     { 
-         var CurrentCookie = ReadCookie("fabletwomaps"); 
-         CurrentCookie = CurrentCookie + CheckBox;    
-         CreateCookie("fabletwomaps",CurrentCookie,"100"); 
-     } 
-     else 
-     { 
-         var CurrentCookie = ReadCookie("fabletwomaps"); 
-         CurrentCookie = CurrentCookie.replace(CheckBox,"");  
-         CreateCookie("fabletwomaps",CurrentCookie,"100"); 
-     } 
- } 
 
- //Runs on body load to check history of checkboxes on the page. 
- function CheckCookies() 
- { 
 
-     var CurrentCookie = ReadCookie("fabletwomaps"); 
 
-     for (i=0; i<document.CheckList.elements.length; i++) 
-     { 
-         if (document.CheckList.elements[i].type == "checkbox") 
-         { 
-             document.CheckList.elements[i].onclick = function() {ChangeBox(this.id);}; 
-             if (CurrentCookie && CurrentCookie.indexOf(document.CheckList.elements[i].id) > -1) 
-             { 
-                 document.CheckList.elements[i].checked = true; 
-             } 
-         } 
-     } 
- } 
-   
- //Clears Form 
- function ClearBoxes() 
- { 
-     for (i=0; i<document.CheckList.elements.length; i++) 
-     { 
-         if (document.CheckList.elements[i].type == "checkbox") 
-         { 
-             document.CheckList.elements[i].checked = false; 
-             ChangeBox(document.CheckList.elements[i].id); 
-         } 
-     } 
- } 
-   
- window.onload=CheckCookies; 
-   
-   
-          
-   
-   
- 1 - 12 de 124 imagenes. 
-   
- <form action="compress.php" method="post" id="album" name="CheckList">   
-         <div class="albumItem"><div class="albumImg"><img src='img/filter_closed.png' alt='filter_closed.png'/></div><div class="albumCheck"><label><input type='checkbox' name='addAlbum[]' id='filter_closed.png' value='filter_closed.png' onclick='countCheckboxes()' />- filter_closed.png </label></div><div class="albumDownload"><a href="http://psy-tribe.co.cc/download.php?file=filter_closed.png"></a></div></div>
 
-         <div class="albumItem"><div class="albumImg"><img src='img/folder_up.png' alt='folder_up.png'/></div><div class="albumCheck"><label><input type='checkbox' name='addAlbum[]' id='folder_up.png' value='folder_up.png' onclick='countCheckboxes()' />- folder_up.png </label></div><div class="albumDownload"><a href="http://psy-tribe.co.cc/download.php?file=folder_up.png"></a></div></div>
 
-         <div class="albumItem"><div class="albumImg"><img src='img/transfer_upload.png' alt='transfer_upload.png'/></div><div class="albumCheck"><label><input type='checkbox' name='addAlbum[]' id='transfer_upload.png' value='transfer_upload.png' onclick='countCheckboxes()' />- transfer_upload.png </label></div><div class="albumDownload"><a href="http://psy-tribe.co.cc/download.php?file=transfer_upload.png"></a></div></div>
 
-         <div class="albumItem"><div class="albumImg"><img src='img/fitwidth_enabled.png' alt='fitwidth_enabled.png'/></div><div class="albumCheck"><label><input type='checkbox' name='addAlbum[]' id='fitwidth_enabled.png' value='fitwidth_enabled.png' onclick='countCheckboxes()' />- fitwidth_enabled.png </label></div><div class="albumDownload"><a href="http://psy-tribe.co.cc/download.php?file=fitwidth_enabled.png"></a></div></div>
 
-         <div class="albumItem"><div class="albumImg"><img src='img/dropup.png' alt='dropup.png'/></div><div class="albumCheck"><label><input type='checkbox' name='addAlbum[]' id='dropup.png' value='dropup.png' onclick='countCheckboxes()' />- dropup.png </label></div><div class="albumDownload"><a href="http://psy-tribe.co.cc/download.php?file=dropup.png"></a></div></div>
 
-   
-         <div class="albumItem"><div class="albumImg"><img src='img/search-suggestion.png' alt='search-suggestion.png'/></div><div class="albumCheck"><label><input type='checkbox' name='addAlbum[]' id='search-suggestion.png' value='search-suggestion.png' onclick='countCheckboxes()' />- search-suggestion.png </label></div><div class="albumDownload"><a href="http://psy-tribe.co.cc/download.php?file=search-suggestion.png"></a></div></div>
 
-         <div class="albumItem"><div class="albumImg"><img src='img/search-suggestion-selected.png' alt='search-suggestion-selected.png'/></div><div class="albumCheck"><label><input type='checkbox' name='addAlbum[]' id='search-suggestion-selected.png' value='search-suggestion-selected.png' onclick='countCheckboxes()' />- search-suggestion-selected.png </label></div><div class="albumDownload"><a href="http://psy-tribe.co.cc/download.php?file=search-suggestion-selected.png"></a></div></div>
 
-         <div class="albumItem"><div class="albumImg"><img src='img/mail_status_disconnected.png' alt='mail_status_disconnected.png'/></div><div class="albumCheck"><label><input type='checkbox' name='addAlbum[]' id='mail_status_disconnected.png' value='mail_status_disconnected.png' onclick='countCheckboxes()' />- mail_status_disconnected.png </label></div><div class="albumDownload"><a href="http://psy-tribe.co.cc/download.php?file=mail_status_disconnected.png"></a></div></div>
 
-         <div class="albumItem"><div class="albumImg"><img src='img/group_closed.png' alt='group_closed.png'/></div><div class="albumCheck"><label><input type='checkbox' name='addAlbum[]' id='group_closed.png' value='group_closed.png' onclick='countCheckboxes()' />- group_closed.png </label></div><div class="albumDownload"><a href="http://psy-tribe.co.cc/download.php?file=group_closed.png"></a></div></div>
 
-         <div class="albumItem"><div class="albumImg"><img src='img/archives.png' alt='archives.png'/></div><div class="albumCheck"><label><input type='checkbox' name='addAlbum[]' id='archives.png' value='archives.png' onclick='countCheckboxes()' />- archives.png </label></div><div class="albumDownload"><a href="http://psy-tribe.co.cc/download.php?file=archives.png"></a></div></div>
 
-         <div class="albumItem"><div class="albumImg"><img src='img/block.png' alt='block.png'/></div><div class="albumCheck"><label><input type='checkbox' name='addAlbum[]' id='block.png' value='block.png' onclick='countCheckboxes()' />- block.png </label></div><div class="albumDownload"><a href="http://psy-tribe.co.cc/download.php?file=block.png"></a></div></div>
 
-   
-         <div class="albumItem"><div class="albumImg"><img src='img/images_cached.png' alt='images_cached.png'/></div><div class="albumCheck"><label><input type='checkbox' name='addAlbum[]' id='images_cached.png' value='images_cached.png' onclick='countCheckboxes()' />- images_cached.png </label></div><div class="albumDownload"><a href="http://psy-tribe.co.cc/download.php?file=images_cached.png"></a></div></div>
 
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-   
- <input type="submit" name="Submit" value="Enviar"> 
-   
-   
Saludos 
