$(document).ready(function() {
	$("#bytopic").bind("click", function(e){ 
		$(this).attr("src", "finder/images/topic-on.jpg"); 
		$("#bydate").attr("src", "finder/images/date-off.jpg"); 
		$("#by-date").hide(); 
		$("#by-topic").show(); 
	});
	$("#bydate").bind("click", function(e){ 
		$(this).attr("src", "finder/images/date-on.jpg"); 
		$("#bytopic").attr("src", "finder/images/topic-off.jpg"); 
		$("#by-date").show(); 
		$("#by-topic").hide(); 
	});
	$("#darrow").bind("click", function(e){ 
		if($("#by-topic").css("display") != "none") {
			$("#by-topic").scrollTo( '+=100px', 800 );
		}
		if($("#by-date").css("display") != "none") {
			$("#by-date").scrollTo( '+=100px', 800 );
		}
	});
	$("#uarrow").bind("click", function(e){ 
		if($("#by-topic").css("display") != "none") {
			$("#by-topic").scrollTo( '-=100px', 800 );
		}
		if($("#by-date").css("display") != "none") {
			$("#by-date").scrollTo( '-=100px', 800 );
		}
	});

});