- // HTML 代码
- <body>
<div id="divid1" class="divclass">白色</div>
<div id="divid2" class="divclass">白色</div>
<div id="divid3" class="divclass">白色</div>
<div id="divid4" class="divclass">白色</div><p style="width:500px;">
<input type="button" value="按钮[绿色]" id="but1" />
<input type="button" value="按钮[红色]" id="but2" />
<input type="button" value="按钮[蓝色]" id="but3" />
<input type="button" value="按钮[黄色]" id="but4" />
</p> - <script type="text/javascript">
- // 初始化自定义选择器
- $(function () {
- $.expr[":"].greenbg = function (obj) {
- if (obj.style.backgroundColor === "green")
- return $(obj).css("background-color", "white"), $(obj).text("白色");
- return $(obj).css("background-color", "green"), $(obj).text("绿色");
- };
- $.expr[":"].redbg = function (obj) {
- if (obj.style.backgroundColor == "red")
- return $(obj).css("background-color", "white"), $(obj).text("白色");
- return $(obj).css("background-color", "red"), $(obj).text("红色");
- };
- $.expr[":"].blackbg = function (obj) {
- if (obj.style.backgroundColor == "blue")
- return $(obj).css("background-color", "white"), $(obj).text("白色");
- return $(obj).css("background-color", "blue"), $(obj).text("红色");
- };
- $.expr[":"].yellowbg = function (obj) {
- if (obj.style.backgroundColor == "yellow")
- return $(obj).css("background-color", "white"), $(obj).text("白色");
- return $(obj).css("background-color", "yellow"), $(obj).text("黄色");
- };
- });
- // 使用自定义选择器
- $("#but1").click(function () {
- $("#divid1:greenbg");
- });
- $("#but2").click(function () {
- $("#divid2:redbg");
- });
- $("#but3").click(function () {
- $("#divid3:blackbg");
- });
- $("#but4").click(function () {
- $("#divid4:yellowbg");
- });
- </script>
时间: 2024-10-10 23:16:00