Ajax点击后载入更多在本页，无刷新-freejs.net代码演示

首页>>分页>>Ajax点击后载入更多在本页，无刷新(2013-09-04)

Ajax点击后载入更多在本页，无刷新

Ajax点击后载入更多在本页，无刷新.

本例是分页的另外一种显示方式,并不是隐藏未显示的内容

数据库结构与《ajax 翻页》是一样的

js代码

JavaScript Code复制内容到剪贴板

<script type="text/javascript">
$(document).ready(function() {
var track_click = 0; //track user click on "load more" button, righ now it is 0 click
var total_pages = <?php echo $total_pages; ?>;
$('#results').load("fetch_pages.php", {'page':track_click}, function() {track_click++;}); //initial data to load
$(".load_more").click(function (e) { //user clicks on button
$(this).hide(); //hide load more button on click
$('.animation_image').show(); //show loading image
if(track_click <= total_pages) //make sure user clicks are still less than total pages
{
//post page number and load returned data into result element
$.post('fetch_pages.php',{'page': track_click}, function(data) {
$(".load_more").show(); //bring back load more button
$("#results").append(data); //append data received from server
//scroll page to button element
$("html, body").animate({scrollTop: $("#load_more_button").offset().top}, 500);
//hide loading image
$('.animation_image').hide(); //hide loading image once data is received
track_click++; //user click increment on load button
}).fail(function(xhr, ajaxOptions, thrownError) {
alert(thrownError); //alert any HTTP error
$(".load_more").show(); //bring back load more button
$('.animation_image').hide(); //hide loading image once data is received
});
if(track_click >= total_pages-1)
{
//reached end of the page yet? disable load button
$(".load_more").attr("disabled", "disabled");
}
}
});
});
</script>

主要代码

XML/HTML Code复制内容到剪贴板

<div id="results"></div>
<div align="center">
<button class="load_more" id="load_more_button">load More</button>
<div class="animation_image" style="display:none;"><img src="ajax-loader.gif"> Loading...</div>
</div>

fetch_pages.php

PHP Code复制内容到剪贴板

<?php
include("conn.php");
$item_per_page = 3;
//sanitize post value
$page_number = filter_var($_POST["page"], FILTER_SANITIZE_NUMBER_INT, FILTER_FLAG_STRIP_HIGH);
//throw HTTP error if page number is not valid
if(!is_numeric($page_number)){
header('HTTP/1.1 500 Invalid page number!');
exit();
}
//get current starting point of records
$position = ($page_number * $item_per_page);
//Limit our results within a specified range.
$results = mysql_query("SELECT * FROM content ORDER BY id DESC LIMIT $position, $item_per_page");
//output results from database
echo '<ul class="page_result">';
while($row = mysql_fetch_array($results))
{
echo '<li id="item_'.$row["id"].'"><span class="page_name">'.$row["id"].') '.$row["name"].'</span><span class="page_message">'.$row["message"].'</span></li>';
}
echo '</ul>';
?>