function animaCategories(){
		var scroll = $(window).scrollTop();
		var menuPosition = 0;
		
		/*
			if the user clicks a link to other page
			and then go back, the menu must be setted to
			its current position.
		*/
		if (scroll > 370){ 
			menuPosition = scroll - 210;
			$('.sidebar').animate({top: menuPosition},'fast');
		}

		$(window).scroll(function(){ 
			$('.sidebar').stop(); 
			scroll = $(window).scrollTop(); 	
			if (scroll > 370) 
			  menuPosition = scroll - 210;
			else 
			  menuPosition = 0;
		});		

		$('body').mouseenter(function(){
      			$('.sidebar').animate({top: menuPosition},'fast'); 
    		}).click(function(){
      			$('.sidebar').animate({top: menuPosition},'fast'); 
    		});

		$(window).mouseup(function(){
      			$('.sidebar').animate({top: menuPosition},'fast'); 
    		});


}





$(document).ready(	
	function(){
			

			
			//$("#wrapper").dropShadow({left: 4, top: 4, blur: 2, opacity: 0.3, color: "#04e", swap: false});
			//$("#header").dropShadow();

		
			$(".shadow-title").dropShadow();
			
		
    			//$("#blog-title").hide("slow"); 
    			//$("#blog-title").show("slow"); 
			//$("#blog-description").hide("slow"); 
    			//$("#blog-description").show("slow"); 

			$(".anima_header").hide("fast"); 
    			$(".anima_header").show("slow"); 
		
			animaCategories()

			//$("#primary").hide(); 
    			//$("#primary").show("slow");
		
		

		
	}
);