/*
 *  Returns an array of jQuery objects, grouped by specified number of elements.
 *  
 *    Say you have 17 <frameset> tags on your page...
 *  
 *    $('frameset').inGroupsOf(7); // => [ jQuery[0..6], jQuery[7..13], jQuery[14..16] ]
 *
 */
$.fn.inGroupsOf = function( countPerGroup ) {
    
    var groups = [], offset = 0, $group;
    
    while ( ($group = this.slice( offset, (countPerGroup + offset) )).length ) {
        groups.push( $group );
        offset += countPerGroup;
    }
    
    return groups;
};