js 实现的可折叠留言板(附源码下载)

$(document).ready(function(){ $(".message_list .message_body:gt(0)").hide(); $(".message_list li:gt(4)").hide(); $(".message_head").click(function(){ $(this).next(".message_body").slideToggle(500) return false; }); //收起所有消息 $(".collpase_all_message").click(function(){ $(".message_body").slideUp(500) return false; }); //显示所有消息 $(".show_all_message").click(function(){ $(this).hide() $(".show_recent_only").show() $(".message_list li:gt(4)").slideDown() return false; }); //只显示最近的消息 $(".show_recent_only").click(function(){ $(this).hide() $(".show_all_message").show() $(".message_list li:gt(4)").slideUp() return false; }); });

* { margin: 0; padding: 0; } body { margin: 10px auto; width: 570px; font: 75%/120% Arial, Helvetica, sans-serif; } p { padding: 0 0 1em; } .message_list { list-style: none; margin: 0; padding: 0; width: 383px; } .message_list li { padding: 0; margin: 0; background: url(images/message-bar.gif) no-repeat; } .message_head { padding: 5px 10px; cursor: pointer; position: relative; } .message_head .timestamp { color: #666666; font-size: 95%; position: absolute; right: 10px; top: 5px; } .message_head cite { font-size: 100%; font-weight: bold; font-style: normal; } .message_body { padding: 5px 10px 15px; } .collapse_buttons { text-align: right; border-top: solid 1px #e4e4e4; padding: 5px 0; width: 383px; } .collapse_buttons a { margin-left: 15px; float: right; } .show_all_message { background: url(images/tall-down-arrow.gif) no-repeat right center; padding-right: 12px; } .show_recent_only { display: none; background: url(images/tall-up-arrow.gif) no-repeat right center; padding-right: 12px; } .collpase_all_message { background: url(images/collapse-all.gif) no-repeat right center; padding-right: 12px; color: #666666;}

<ol class="message_list"> <li> <p class="message_head"><cite>张三:</cite> <span class="timestamp">1分钟前</span></p> <div class="message_body"> <p>你好<br /> <br /> 这是最后一条消息</p> </div> </li> <li> <p class="message_head"><cite>李四:</cite> <span class="timestamp">2分钟前</span></p> <div class="message_body"> <p>你也好</p> </div> </li> <li> <p class="message_head"><cite>王五:</cite> <span class="timestamp">1天前</span></p> <div class="message_body"> <p>第一次来</p> </div> </li> <li> <p class="message_head"><cite>李四:</cite> <span class="timestamp">2天前</span></p> <div class="message_body"> <p>顶</p> </div> </li> <li> <p class="message_head"><cite>王五:</cite> <span class="timestamp">3天前</span></p> <div class="message_body"> <p>支持</p> </div> </li> <li> <p class="message_head"><cite>李四:</cite> <span class="timestamp">5天前</span></p> <div class="message_body"> <p>大家好</p> </div> </li> <li> <p class="message_head"><cite>张三:</cite> <span class="timestamp">6 天前</span></p> <div class="message_body"> <p>大家好</p> </div> </li> <li> <p class="message_head"><cite>李四:</cite> <span class="timestamp">7天前</span></p> <div class="message_body"> <p>这里不错哦</p> </div> </li> <li> <p class="message_head"><cite>王五:</cite> <span class="timestamp">8 天前</span></p> <div class="message_body"> <p>好地方</p> </div> </li> </ol> <p class="collapse_buttons"><a href="#" class="show_all_message">显示所有消息(9)</a> <a href="#" class="show_recent_only">只显示五条消息</a> <a href="#" class="collpase_all_message">收起所有消息</a></p> <br />