Ajax from PHP

CFBFeatures

AJAX:

var count = 2;
	var loader = $('.infinite-loader');
	
	$(window).scroll(function() {

		if($(window).scrollTop() == $(document).height() - $(window).height()) {
			
			if(count > total) {
				return false;
			} else {
				loadInfiniteContent(count);
			}
			
			count++;
			
		}
		
	});

	function loadInfiniteContent(pageNumber) {
		
		loader.fadeIn(500);
		
		$.ajax({
			
			url: '/wp-admin/admin-ajax.php',
			type: 'POST',
			data: 'action=infinite_scroll&page_no=' + pageNumber + '&loop_file=loop',
			success: function(html) { 
				loader.fadeOut(500);
				$('#main-content').append(html);
			}
			
		});
		
		return false;
		
	}

PHP FILE:

function wp_infinitepaginate(){
    $loopFile        = $_POST['loop_file'];
    $paged           = $_POST['page_no'];
    $posts_per_page  = get_option('posts_per_page');

    query_posts(array('paged' => $paged ));
    get_template_part( $loopFile );
    exit;
}