function makeScrollable(wrapper, scrollable){

    // Get jQuery elements
    var wrapper = $(wrapper), scrollable = $(scrollable);
    scrollable.hide();

    wrapper.css({overflow: 'hidden'});

    scrollable.slideDown('fast', function(){ enable(); });


    function enable(){
	// height of area at the top at bottom, that don't respond to mousemove
	var inactiveMargin = 99;
	// Cache for performance
	var wrapperWidth = wrapper.width();
	var wrapperHeight = wrapper.height();
	// Using outer height to include padding too
	var scrollableHeight = scrollable.outerHeight() + 2*inactiveMargin;
	// Do not cache wrapperOffset, because it can change when user resizes window
	// We could use onresize event, but it's just not worth doing that 
	// var wrapperOffset = wrapper.offset();
	
	// Create a invisible tooltip
	var tooltip = $('<div class="sc_menu_tooltip"></div>')
	    .css('opacity', 0)
	    .appendTo(wrapper);
	
	// Save menu titles
	scrollable.find('a').each(function(){
	    $(this).data('tooltipText', this.title);
	});
	
	// Remove default tooltip
	scrollable.find('a').removeAttr('title');
	// Remove default tooltip in IE
	scrollable.find('img').removeAttr('alt');
	
	var lastTarget;
	//When user move mouse over menu
	wrapper.mousemove(function(e){
	    // Save target
	    lastTarget = e.target;
	    
	    var wrapperOffset = wrapper.offset();
	    
	    var tooltipLeft = e.pageX - wrapperOffset.left;
	    // Do not let tooltip to move out of menu.
	    // Because overflow is set to hidden, we will not be able too see it 
	    tooltipLeft = Math.min(tooltipLeft, wrapperWidth - 75); //tooltip.outerWidth());
	    
	    var tooltipTop = e.pageY - wrapperOffset.top + wrapper.scrollTop() - 40;
	    // Move tooltip under the mouse when we are in the higher part of the menu
	    if (e.pageY - wrapperOffset.top < wrapperHeight/2){
		tooltipTop += 80;
	    }
	    tooltip.css({top: tooltipTop, left: tooltipLeft});
	    
	    // Scroll menu
	    var top = (e.pageY -  wrapperOffset.top) * (scrollableHeight - wrapperHeight) / wrapperHeight - inactiveMargin;
	    if (top < 0){
		top = 0;
	    }
	    wrapper.scrollTop(top);
	});
	
	// Setting interval helps solving perfomance problems in IE
	var interval = setInterval(function(){
	    if (!lastTarget) return;
	    
	    var currentText = tooltip.text();
	    
	    if (lastTarget.nodeName == 'IMG'){
		// We've attached data to a link, not image
		var newText = $(lastTarget).parent().data('tooltipText');
		
		// Show tooltip with the new text
		if (currentText != newText) {
		    tooltip
			.stop(true)
			.css('opacity', 0)
			.text(newText)
			.animate({opacity: 1}, 1000);
		}
	    }
	}, 200);
	
	// Hide tooltip when leaving menu
	wrapper.mouseleave(function(){
	    lastTarget = false;
	    tooltip.stop(true).css('opacity', 0).text('');
	});
	
    }
}