[maximus2011]

$(function(){
	var  wsl, hsl;
	
	wsl = $('#slider').width();
	hsl = $('#slider').height();
	
	var totalBlockWidth, totalBlockHeight, numberBox;
	
	totalBlockWidth = wsl/4;
	totalBlockHeight = hsl;
	
	
	$('#slider').append('<div class="hiddenBlock">');
	$('.hiddenBlock').css({'width': + totalBlockWidth + 'px', 'height': + totalBlockHeight + 'px'});
	numberBox = $('.hiddenBlock').length;
});

все дальше не могу ))