<script src="http://127.0.0.1/study/jquery.min.js"></script>
  
<script>
$(function(){
   $("#b1").click(function(){
      $("#d1").addClass("pink");
   });
   
});
   
</script>
  <button id="b1">给id=d1的div增加背景色</button>
<br>
<br>
  
<style>
.pink{
   background-color:pink;
}
</style>
   
<div id="d1">
Hello JQuery
</div>
 
<div id="d2" >
Hello JQuery
</div>
 
<div  id="d3">
Hello JQuery
</div>

<script src="http://127.0.0.1/study/jquery.min.js"></script>
  
<script>
$(function(){
   $("#b1").click(function(){
      $(".d").addClass("pink");
   });
   
});
   
</script>
  <button id="b1">给class='d'的div增加背景色</button>
<br>
<br>
  
<style>
.pink{
   background-color:pink;
}
</style>
   
<div class="d">
Hello JQuery
</div>
 
<div class="d" >
Hello JQuery
</div>
 
<div  >
Hello JQuery
</div>

<script src="http://127.0.0.1/study/jquery.min.js"></script>
   
<script>
$(function(){
   $("#b1").click(function(){
      $("div#d3 span").addClass("pink");
   });
    
});
    
</script>
  <button id="b1">给id='d3'的div 下的 span 增加背景色</button>
<br>
<br>
   
<style>
.pink{
   background-color:pink;
}
</style>
    
<div class="d">
  <span>Hello JQuery</span>
   
</div>
  
<div class="d" >
  <span>Hello JQuery</span>
</div>
  
<div id="d3" >
  <span>Hello JQuery</span>
</div>

<script src="http://127.0.0.1/study/jquery.min.js"></script>
    
<script>
$(function(){
   $("#b1").click(function(){
      $("div:first").addClass("pink");
   });
     
   $("#b2").click(function(){
      $("div:last").addClass("pink");
   });

});
     
</script>
  <button id="b1">第一个增加背景色</button>
  <button id="b2">最后一个增加背景色</button>
<br>
<br>
    
<style>
.pink{
   background-color:pink;
}
</style>
     
<div>
  <span>Hello JQuery</span>
    
</div>
   
<div >
  <span>Hello JQuery</span>
</div>
   
<div >
  <span>Hello JQuery</span>
</div>

<script src="http://127.0.0.1/study/jquery.min.js"></script>
     
<script>
$(function(){
   $("#b1").click(function(){
      $("div:odd").toggleClass("pink");
   });
      
   $("#b2").click(function(){
      $("div:even").toggleClass("green");
   });
 
});
      
</script>
  <button id="b1">切换奇数背景色</button>
  <button id="b2">切换偶数背景色</button>
<br>
<br>
     
<style>
.pink{
   background-color:pink;
}
.green{
   background-color:green;
}
</style>
      
<div>
  <span>Hello JQuery 0</span>
     
</div>

<div>
  <span>Hello JQuery 1</span>
     
</div>
    
<div >
  <span>Hello JQuery 2</span>
</div>
    
<div >
  <span>Hello JQuery 3</span>
</div>

<div >
  <span>Hello JQuery 4</span>
</div>

</div>
    
<div >
  <span>Hello JQuery 5</span>
</div>
    
<div >
  <span>Hello JQuery 6</span>
</div>

<script src="http://127.0.0.1/study/jquery.min.js"></script>
       
<script>
$(function(){
   $("#b1").click(function(){
     $("div:visible").hide();
   });
   $("#b2").click(function(){
      $("div:hidden").show();      
   });
});
        
</script>
  <button id="b1">隐藏可见的</button>
  <button id="b2">显示不可见的</button>
 
<br>
<br>
       
<style>
.pink{
   background-color:pink;
}
 
</style>
        
<div>
  <span>Hello JQuery 1</span>
       
</div>
      
<div >
  <span>Hello JQuery 2</span>
</div>
      
<div >
  <span>Hello JQuery 3</span>
</div>
  
<div >
  <span >Hello JQuery 4</span>
</div>
  
</div>
      
<div >
  <span>Hello JQuery 5</span>
</div>
      
<div >
  <span>Hello JQuery 6</span>
</div>

<script src="http://127.0.0.1/study/jquery.min.js"></script>
      
<script>
$(function(){
   $("#b1").click(function(){
      $("div[id]").toggleClass("border");
   });
   $("#b2").click(function(){
      $("div[id='pink']").toggleClass("border");
   });
   $("#b3").click(function(){
      $("div[id!='pink']").toggleClass("border");
   });
   $("#b4").click(function(){
      $("div[id^='p']").toggleClass("border");
   });
   $("#b5").click(function(){
      $("div[id$='k']").toggleClass("border");
   });
   $("#b6").click(function(){
      $("div[id*='ee']").toggleClass("border");
   });

});
       
</script>
  <button id="b1">给有id属性的div切换边框</button>
  <button id="b2">给id=pink的div切换边框</button>
  <button id="b3">给有id!=pink属性的div切换边框</button>
  <button id="b4">给有id以p开头的div切换边框</button>
  <button id="b5">给有id以k结尾的div切换边框</button>
  <button id="b6">给有id包含ee的div切换边框</button>

<br>
<br>
      
<style>
.pink{
   background-color:pink;
}
.green{
   background-color:green;
}
.border{
   border: 1px blue solid;
   
}

button{ 
   margin-top:10px;
   display:block;
}

div{ 
  margin:10px;
}
</style>
       
<div id="pink">
    id=pink的div
</div>
     
<div id="green">
  id=green的div
</div>
     
<div >
   没有id的div
</div>

<script src="http://127.0.0.1/study/jquery.min.js"></script>

<script>
$(function(){
   $(".b").click(function(){
   	  var value = $(this).val();
      $("td[rowspan!=13] "+value).toggle(500);
   });
       
});
       
</script>

<style>
table{
	border-collapse:collapse;
        table-layout:fixed;
	width:80%;
}
table td{
	border-bottom: 1px solid #ddd;
	padding-bottom: 5px;
	padding-top: 5px;
}

div button{
	display:block;
}

</style>

<table>
	<tr>
		
		<td rowspan="13" valign="top" width="150px">
			<div >
				<button value=":input" class="b">切换所有的:input</button>
				<button value=":button" class="b">切换:button</button>
				<button value=":radio" class="b">切换:radio</button>		
				<button value=":checkbox" class="b">切换:checkbox</button>		
				<button value=":text" class="b">切换:text</button>		
				<button value=":password" class="b">切换:password</button>		
				<button value=":file" class="b">切换:file</button>		
				<button value=":submit" class="b">切换:submit</button>		
				<button value=":image" class="b">切换:image</button>		
				<button value=":reset" class="b">切换:reset</button>			
			</div>			
		</td>
		<td width="120px">说明</td>
		<td width="120px">表单对象</td>
		<td width="">示例</td>
	</tr>
<tr>
  <td >input按钮</td>
  <td >:button</td>
  <td><input type="button" value="input按钮"/></td>
</tr>

<tr>
  <td>button按钮</td>
  <td >:button</td>
  <td><button>Button按钮</button></td>
</tr>
<tr>
  <td>单选框</td>
  <td >:radio</td>
  <td><input type="radio" ></td>
</tr>
<tr>
  <td>复选框</td>
  <td >:checkbox</td>
  <td><input type="checkbox"  ></td>
</tr>

<tr>
  <td>文本框</td>
  <td >:text</td>
  <td><input type="text" /></td>
</tr>
<tr>
  <td>文本域</td>
  <td ></td>
  <td><textarea></textarea></td>
</tr>
<tr>
  <td>密码框</td>
  <td >:password</td>
  <td><input type="password" /></td>
</tr>
<tr>
  <td>下拉框</td>
  <td ></td>
  <td><select><option>Option</option></select></td>
</tr>

<tr>
  <td>文件上传</td>
  <td >:file</td>
  <td> <input type="file" /></td>
</tr>

<tr>
  <td>提交按钮</td>
  <td >:submit</td>
  <td><input type="submit" /></td>
</tr>
<tr>
  <td>图片型提交按钮</td>
  <td >:image</td>
  <td><input type="image" src="http://127.0.0.1/example.gif" /></td>
</tr>

<tr>
  <td>重置按钮</td>
  <td >:reset</td>
  <td><input type="reset" /></td>
</tr>

</table>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<script src="http://127.0.0.1/study/jquery.min.js"></script>

<script>
$(function(){
   $(".b").click(function(){
   	  var value = $(this).val();
      $("td[rowspan!=13] "+value).toggle(500);
   });
   
   $(".b2").click(function(){
   	  var value = $(this).val();
   	  var options = $("td[rowspan!=13] "+value);
	  alert("选中了"+options.length+"条记录！");
   });
       
});
       
</script>

<style>
table{
	border-collapse:collapse;
        table-layout:fixed;
	width:80%;
}
table td{
	border-bottom: 1px solid #ddd;
	padding-bottom: 5px;
	padding-top: 5px;
}

div button{
	display:block;
}

.border{
   border: 1px blue solid;
    
}

</style>

<table>
	<tr>
		
		<td rowspan="13" valign="top" width="120">
			<div >
				<button value=":enabled" class="b">切换:enabled</button>
				<button value=":disabled" class="b">切换:disabled</button>		
				<button value=":checked" class="b">切换:checked</button>		
				<button value=":selected" class="b2">:selected数量</button>		
			</div>			
		</td>
		<td width="120">说明</td>
		<td width="120">表单对象属性</td>
		<td width="100px">示例</td>
	</tr>
<tr>
  <td >enabled的按钮</td>
  <td >:enabled</td>
  <td><input type="button" enabled="enabled" value="enabled的按钮"/></td>
</tr>

<tr>
  <td >disabled的按钮</td>
  <td >:disabled</td>
  <td><input type="button" disabled="disabled" value="disabled的按钮"/></td>
</tr>

  <td >选中的复选框</td>
  <td >:checked</td>
  <td>
  	
  	<input type="radio" checked="checked" ><br>
  	<input type="radio" ><br>
  	<input type="checkbox" ><br>
  	<input type="checkbox" checked="checked" >
  </td>

<tr>
  <td>选中的下拉列表</td>
  <td >:selected</td>
  <td>
  	<select size="3" multiple="multiple">
 	   <option selected="selected">苍老师</option>
       <option >高树玛利亚</option>
       <option selected="selected">遥美</option>
    </select>
  </td>
</table>

<form>

</form>

<script src="http://127.0.0.1/study/jquery.min.js"></script>
  
<script>
$(function(){
   $("#b1").click(function(){
     $(this).hide();
   });
   
});
</script>
 
<button id="b1">点击隐藏</button>