jquery 练习题

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一.高亮选择（主要用到addclass和removeclass方法，它们用于增删样式）

<html xmlns="http://www.w3.org/1999/xhtml"><head>    <title></title>    <script src="JScript/jquery-1.9.1.js" type="text/javascript"></script>    <style type="text/css">        .hightlight{background-color:Yellow}    </style>    <script type="text/javascript">        $(function () {            $("#table1 tr").mouseover(function () {                $(this).addClass("hightlight").siblings().removeClass("hightlight");            });        });    </script></head><body><table id="table1" border="" cellspacing="0" cellpadding="0" width="100%">    <tr>        <td>fadfa</td>    </tr>    <tr>        <td>fafdaf</td>    </tr>    <tr>        <td>fafaf</td>    </tr>    <tr>        <td>fafdafa</td>    </tr></table></body></html>

二、换肤功能

<html xmlns="http://www.w3.org/1999/xhtml"><head>    <title></title>    <script src="JScript/jquery-1.9.1.js" type="text/javascript"></script>    <script src="JScript/jquery.cookie.js" type="text/javascript"></script>    <script type="text/javascript">        $(function () {            if ($.cookie("lastcolor")) {                $(document.body).css("background-color", $.cookie("lastcolor"));            };            $("table td").click(function () {                $.cookie("lastcolor", $(this).css("background-color"), {expires:1});                $(document.body).css("background-color", $(this).css("background-color")).css("cursor","Pointer");            });        });           </script></head><body><table border="1" cellspacing="0" cellpadding="0" width="10%">    <tr>        <td style="background-color:Red">红色</td>        <td style="background-color:Blue">蓝色</td>        <td style="background-color:Green">绿色</td>    </tr></table></body></html>

三、全选、反选等

<html xmlns="http://www.w3.org/1999/xhtml"><head>    <title></title>    <script src="JScript/jquery-1.9.1.js" type="text/javascript"></script>    <script type="text/javascript">        $(function () {            $("#selall").click(              function () {                  $(":checkbox").attr("checked", true);                                 });              });             $("#selnone").click(              function () {                  $(":checkbox").attr("checked", false);                                 });              });              $("#resver").click(function () {                $(":checkbox").each(function () {                  $(this).attr("checked",!$(this).attr("checked"))                });              });                      });       $(function () {       });         </script></head><body><div id="plalst"><input type="checkbox"  />一队<input type="checkbox" />二队<input type="checkbox" />三队<input type="checkbox" />四队<input type="checkbox" />五队<input type="checkbox" />六队</div><br /><br /><br /><input type="button" id="selall"  value="全选" /><input type="button" id="selnone" value="全不选" /><input type="button" id="resver" value="反选" /><a href="http://www.sina.com" id="link1">sina</a></body></html>

四、把ul当成table来处理，并在点击表头时自动展开或关闭子项

<html xmlns="http://www.w3.org/1999/xhtml"><head>    <title></title>    <script src="JScript/jquery-1.9.1.js" type="text/javascript"></script>    <script type="text/javascript">        $(function () {            $("#qq li:even").addClass("header").mouseover(function () {                $(this).next("li.detail").show().siblings("li.detail").hide("slow");            }); /*所有包含detail的li的元素隐藏或显示*/            $("#qq li:odd").addClass("detail");        });    </script>    <style type="text/css">      ul{list-style-type:none } /*去掉前面的点号*/      .header{background-color:Blue;cursor:pointer;} /*头样式*/      .detail{background-color:Lime;border-color:Gray;border-width:1px;} /*明细样式*/    </style></head><body><ul id="qq" >    <li>我的好友</li>    <li>张三<br/>李四</li>        <li>我的同学</li>    <li>ABC<br />FFX</li>        <li>陌生人</li>    <li>And1<br/>Jim</li>    </ul></body></html>

五、网页变灰白，主要是用到样式，把documnet全变个背景色为灰白的即可

<html xmlns="http://www.w3.org/1999/xhtml"><head>    <title></title>    <script src="JScript/jquery-1.9.1.js" type="text/javascript"></script>    <script type="text/javascript">        $(function () {            $("#btn").click(function () {//目前不支持哦                $(document.body).toggleClass("blackwhite");                            });        });    </script>    <style type="text/css">       .blackwhite{filter:Gray;}             </style>    </head><body><input type="button" id="btn" value="变黑白"/><img src="imgs/45280.jpg"/></body></html>

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