$(document).ready(function(){
    
    nav = 0;
    
    $("#home").click(function () {
    	if (nav == 1){
    		nav = 4;
    		$("#main_about").fadeOut("slow");
    		
    	} else if (nav == 2){
    		nav = 4;
    		$("#main_about").hide();
    		$("#main_sample").fadeOut("slow");

    	} else if (nav == 3){
    		nav = 4;
    		$("#main_about").hide();
    		$("#main_sample").hide();
    		$("#main_link").fadeOut("slow");	
    	}
    	nav = 0;
    	
    });
    
    $("#about").click(function () {
    	if (nav == 0){
    		nav = 4;
    		$("#main_about").fadeIn("slow");
    		
    	} else if (nav == 2){
    		nav = 4;
    		$("#main_sample").fadeOut("slow");

    	} else if (nav == 3){
    		nav = 4;
    		$("#main_sample").hide();
    		$("#main_link").fadeOut("slow");
    	}
    	nav = 1;
    	
   	});
    	
   	$("#sample").click(function () {
   	
   		$("#movie").show();
   	
    	if (nav == 0){
    		nav = 4;
    		$("#main_sample").fadeIn("slow",
    		function(){$("#main_about").show()});
    		
    	} else if (nav == 1){
    		nav = 4;
    		$("#main_sample").fadeIn("slow");

    	} else if (nav == 3){
    		nav = 4;
    		$("#main_link").fadeOut("slow");	
    	}
    	nav = 2;
    	
   	});
    	
    $("#link").click(function () {
    	
    	$("#movie").hide();
    	
    	if (nav == 0){
    		nav = 4;
    		$("#main_link").fadeIn("slow",
    		function(){
    		$("#main_about").show();
    		$("#main_sample").show();
    		});
    		
    	} else if (nav == 1){
    		nav = 4;
    		$("#main_link").fadeIn("slow",function(){
    		$("#main_sample").show();
    		});

    	} else if (nav == 2){
    		nav = 4;
    		$("#main_link").fadeIn("slow");
    	}
    	nav = 3;
    	
    });

});