// BOOK TAB
function book_tab_init()
{	
	// set the sizes of inner divs
	$('.book-tab-container').each(function(){
		var elem = $(this);
		var w = parseInt(elem.css('width')) - 20 + 'px';
		var h = elem.css('height');
		$($(elem.children('div')[0]).children('div')).css({width:w,height:h,float:"left",padding:10});
	});


	$('.book-tab-header').each(function() {
		$(this).children('div')[0].lang = 1;
	});
	
	// on click do the scrolling
	$('.book-tab-header').click(function(event){		
		var tab_elem = $(event.target);		
		var all_tabs = tab_elem.parent('div').children('div');
		all_tabs.attr('lang', 0);
		tab_elem.attr('lang', 1);
		
		for(i=0; i < all_tabs.length; i++)
		{
			child = $(all_tabs[i]);			
			if(child.attr('lang') == 1)
			{
				var tab_container = $(this).next();				
				tab_container.scrollTo($($(tab_container.children('div')[0]).children('div')[i]), 600);
				break;
			}
		}
	});	
}