var selected_num = 1;

function show_slide(num) {
	selected_num = parseInt(num);
	$('.slide_nav').removeClass('selected-nav');
	$('.selected_home_slide').hide().removeClass('selected_home_slide');
	$('#slide_'+ selected_num).show().addClass('selected_home_slide');
	$('#slide_nav_'+ selected_num).addClass('selected-nav');
}

$(function(){
	$('.script-nav-specific').click(function(){
		show_slide( $(this).attr('data-num') );
	});
	$('.script-nav-previous').click(function(){
		var num = selected_num - 1;
		if ( num <= 0 ) {
			var i = 5;
			for(i = 5; i >= 1; i--) {
				num = i;
				if ( $('#slide_'+ i).length > 0 ) {
					break;
				}
			}
		}
		show_slide(num);
	});
	$('.script-nav-next').click(function(){
		var num = selected_num + 1;
		if ( $('#slide_'+ num).length > 0 ) {
			show_slide(num);
		} else {
			show_slide(1);
		}
	});
});