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实例

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>实战:表格自动生成器</title>
	<style type="text/css">
		h3 {
			color: green;
			margin-left:40px;
		}
		button {
			width: 80px;
			height: 30px;
			border: none;
			background-color: green;
			color:white;
			margin-right: 30px;
		}
	</style>
</head>
<body>
	<h3>表格生成器</h3>
	<p><label>输入行:<input type="text" name="rows"></label></p>
	<p><label>输入列:<input type="text" name="cols"></label></p>
	<p><button>生成表格</button><button>重置行列</button></p>
 <!--    <p><label>输入行:<input type="text" name="rows"></label></p>
    <p><label>输入列:<input type="text" name="cols"></label></p>
    <p><button>生成表格</button><button>重置行列</button></p> -->
	<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
	<script type="text/javascript">
		//创建请求标志,防止重复请求
		var flag = true
		$('button:first').on('click',function(){
			// alert(0)验证代码
            // 第一步：遍历并验证用户输入的信息
            // $(选择器).each(对象索引，当前对象)
            $(':input').not('button').each(function(index,obj){
            	// 非空判断
            	// alert($(obj).val())验证代码
           
            if ($(obj).val().length==0){ 
                //在当前元素后面添加提示信息
                $(obj).after('<span style="color:red">不能为空</span>')
                  // 定时器清空
                  setTimeout(function(){
                       $(obj).next().remove()
                  },1500)
                  return true
                  // 非数字判断
            }else if (isNaN($(obj).val())){ 
                    //在当前元素后面添加提示信息
                    $(obj).after('<span style="color:red">必须为数字</span>')
                      // 定时器清空
                      setTimeout(function(){
                            $(obj).next().remove()
                      },1500)
                      return true
            } else if($(obj).val()<=0) {       
                            //在当前元素后面添加提示信息
                    $(obj).after('<span style="color:red">必须大于零</span>')
                      // 定
                      // 
                      // 时器清空
                      setTimeout(function(){
                            $(obj).next().remove()
                      },1500)
                      return false
                      }
                          //第二点:处理用户的请求(Ajax实现)
                          if (flag == false) {
                              $.get(
                                  //1.请求处理的脚本
                                  'demo8.php',
                                  //2.发送的请求参数
                                  {
                                      rows: $('input[name="rows"]').val(),
                                      cols: $('input[name="cols"]').val()
                                  },
                                  //3.请求成功的回调函数
                                  function(data){
                                  //先将上一次生成的表格删除
                                  $('p:last').next().remove()
                                  //生成新的表格
                                  $('p:last').after('data')
                                  //将请求标志设置为false,禁止重复请求
                                  flag = false
                              })
                          
                          }
                          })
                          }) 
                          

                      
                        
                    </script>
                  </body>
                  </html>

运行实例 »

点击 "运行实例" 按钮查看在线实例

实例

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>实战:表格自动生成器</title>
	<style type="text/css">
		h3 {
			color: green;
			margin-left:40px;
		}
		button {
			width: 80px;
			height: 30px;
			border: none;
			background-color: green;
			color:white;
			margin-right: 30px;
		}
	</style>
</head>
<body>
	<h3>表格生成器</h3>
	<p><label>输入行:<input type="text" name="rows"></label></p>
	<p><label>输入列:<input type="text" name="cols"></label></p>
	<p><button>生成表格</button><button>重置行列</button></p>
 <!--    <p><label>输入行:<input type="text" name="rows"></label></p>
    <p><label>输入列:<input type="text" name="cols"></label></p>
    <p><button>生成表格</button><button>重置行列</button></p> -->
	<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
	<script type="text/javascript">
		//创建请求标志,防止重复请求
		var flag = true
		$('button:first').on('click',function(){
			// alert(0)验证代码
            // 第一步：遍历并验证用户输入的信息
            // $(选择器).each(对象索引，当前对象)
            $(':input').not('button').each(function(index,obj){
            	// 非空判断
            	// alert($(obj).val())验证代码
           
            if ($(obj).val().length==0){ 
                //在当前元素后面添加提示信息
                $(obj).after('<span style="color:red">不能为空</span>')
                  // 定时器清空
                  setTimeout(function(){
                       $(obj).next().remove()
                  },1500)
                  return true
                  // 非数字判断
            }else if (isNaN($(obj).val())){ 
                    //在当前元素后面添加提示信息
                    $(obj).after('<span style="color:red">必须为数字</span>')
                      // 定时器清空
                      setTimeout(function(){
                            $(obj).next().remove()
                      },1500)
                      return true
            } else if($(obj).val()<=0) {       
                            //在当前元素后面添加提示信息
                    $(obj).after('<span style="color:red">必须大于零</span>')
                      // 定
                      // 
                      // 时器清空
                      setTimeout(function(){
                            $(obj).next().remove()
                      },1500)
                      return false
                      }
                          //第二点:处理用户的请求(Ajax实现)
                          if (flag == false) {
                              $.get(
                                  //1.请求处理的脚本
                                  'demo8.php',
                                  //2.发送的请求参数
                                  {
                                      rows: $('input[name="rows"]').val(),
                                      cols: $('input[name="cols"]').val()
                                  },
                                  //3.请求成功的回调函数
                                  function(data){
                                  //先将上一次生成的表格删除
                                  $('p:last').next().remove()
                                  //生成新的表格
                                  $('p:last').after('data')
                                  //将请求标志设置为false,禁止重复请求
                                  flag = false
                              })
                          
                          }
                          })
                          }) 
                          

                      
                        
                    </script>
                  </body>
                  </html>

运行实例 »

点击 "运行实例" 按钮查看在线实例

Correction status：Uncorrected

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3.21作业

2018-03-26 18:18:11