利用eval()打造通用的checkbox全选、全部取消、反选函数升级版+3

快来打我* 2024-03-24 06:33 34阅读 0赞

昨天对“圳品”信息系统中的通用的checkbox全选、全部取消、反选函数内部代码进行了修改完善，在Edge浏览器中运行正常。详见：[利用eval()打造通用的checkbox全选、全部取消、反选函数升级版+2][eval_checkbox_2]

今天测试发现代码在editplus（应该是调用IE浏览器）中运行时会出错，比如点击“全部取消”按钮：

![a60a470b33c247f8b119038ecd87963f.jpeg][]

> 行:132  
> Char :13  
> 错误:无法获取未定义或null引用的属性“checked"  
> 代码:0  
> URL:file:///C: /Users/pe/AppData/Local/T emp/non3945. htm

经分析研究，决定先对checkbox进行判断，再检测是否有checked属性值。

调试发现checkbox的值为“\[object HTMLInputElement\]”，那么我们对通用函数代码进行修改，比如全选按钮函数代码改为：

//全选,s:checkboxname
    function checkAll(s)
    {
    	var i = 0;  
    	while (eval(s)[i]=="[object HTMLInputElement]"
    	       && typeof(eval(s)[i].checked)!="undefined")
    	{
                eval(s)[i++].checked = true;
    	}
    }

完整的代码如下：

<!DOCTYPE html>
    <html>
    <head>
      <meta name="Author" content="PurpleEndurer">
      <title>“圳品”信息系统</title>
    </head>
    <body>
      <p><strong>利用eval()打造通用的checkbox全选、全部取消、反选通用函数升级版+3 by PurpleEndurer</strong></p>  
        <div id="divArea">
            县（区）： 
            <script>
                function showCbStateBox(n)
                {
                    document.write(' <input type="button" value="全选" onclick="checkAll(', "'", n, "'",')" />');
                    document.write(' <input type="button" value="全部取消" onclick="uncheckAll(', "'", n, "'", ')" />');
                    document.write(' <input type="button" value="反选" onclick="reverseCheck(', "'", n, "'", ')" />');
                }
     
                aArea = new Array(
                    "河池",    //0
                    "金城江",    //1
                    "宜州",    //2
                    "罗城",    //3
                    "环江",    //4
                    "南丹",    //5
                    "天峨",    //6
                    "东兰",    //7
                    "巴马",    //8
                    "凤山",    //9
                    "都安",    //10
                    "大化");    //11
     
                function showAreaChkBox()
                {
                    var i;
                    for (i = 0; i < aArea.length; i++)
                    {
                         document.write('<input type="checkbox" checked="true" name="',i,'" >',aArea[i],'</input> ');
                     }
                }       
                showAreaChkBox();
                showCbStateBox("cbArea");
            </script>
        </div>
         <div id="divZpProg">
    	<strong>认证状态：</strong> 
    	<script>
    		const aZpProg = new Array("已获评",//0
    				"已完成现场评价", //1
    				"待现场评价",//2
    				"待补充材料", //3
    				"未通过评价"//4
    		);
     
    		function showZpProgChkBox()
    		{
    			var i;
    			 document.write('<input type="checkbox" checked="true" name="cbZpProg0">',aZpProg[0],'</input> ');
    			for (i = 1; i < aZpProg.length; i++)
    			{
    				 document.write('<input type="checkbox" name="cbZpProg',i,'">',aZpProg[i],'</input> ');
    			}
    			showCbStateBox("cbZpProg");
    		}       
    		showZpProgChkBox();
    	</script>
        </div>       	
    
        <div id="divCertYear">
            认证时间：
            <script>
                function showCertYearChkBox()
                {
                    var i, d = new Date();
                    d = d.getFullYear();
                    for (i = 2020; i <= d; i++)
                    {
                         document.write('<input type="checkbox" checked="true" name="', i, '" >', i, '</input> ');
                   }
                }       
                showCertYearChkBox();
                showCbStateBox("cbCertYear");
            </script>
        </div>
     
        <div id="divCol">
            显示信息包含：
            <script>
                var g_aCol = new Array("序号","所属县区","企业名称","产品名称","证书编号","认证时间","有效期","备注");
              
                function showColChkBox()
                {
                    var i;
                    for (i = 0; i < g_aCol.length; i++)
                    {
                         document.write('<input type="checkbox" checked="true" name="',i,'" >',g_aCol[i],'</input> ');
                    }
                }       
                showColChkBox();
                showCbStateBox("cbCol");
            </script>
        </div>
     
    <script>
        var divArea = document.getElementById("divArea");
        var cbArea = divArea.getElementsByTagName("input");
              
        var divCol = document.getElementById("divCol");
        var cbCol = divCol.getElementsByTagName("input");
    
        var divZpProg = document.getElementById("divZpProg");
        var cbZpProg = divZpProg.getElementsByTagName("input");
    
        var divCertYear = document.getElementById("divCertYear");
        var cbCertYear =  divCertYear.getElementsByTagName("input");
        
        //全选,s:checkboxname
    function checkAll(s)
    {
    	var i = 0;  
    	while (eval(s)[i]=="[object HTMLInputElement]"
    	       && typeof(eval(s)[i].checked)!="undefined")
    	{
                eval(s)[i++].checked = true;
    	}
    }
     
    
     
    //全部取消,s:checkboxname
    function uncheckAll(s)
    {
    	var i = 0;  
    	while (eval(s)[i]=="[object HTMLInputElement]"
    	       && typeof(eval(s)[i].checked)!="undefined")
    	{
                eval(s)[i++].checked = false;
        }
    }
    
     
    //反选,s:checkboxname
    function reverseCheck(s)
     {
    	var i = 0;  
    	while (eval(s)[i]=="[object HTMLInputElement]"
    	       && typeof(eval(s)[i].checked)!="undefined" )
    	{
                eval(s)[i].checked = !(eval(s)[i].checked);
    		    i++;
    	}
    }              
    </script>
     
    </body>
    </html>

在EditPlus中的运行效果如下：

![ebefd0f4b87f4f99818a1b83677d7e44.gif][]

在Edge浏览器中的运行效果如下：

![8ad6e51a4c1740439553ba25cfb57ee8.gif][]

[eval_checkbox_2]: https://blog.csdn.net/Purpleendurer/article/details/129808306?spm=1001.2014.3001.5501
[a60a470b33c247f8b119038ecd87963f.jpeg]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/24/315fdb1fa80342e7ad054cc799d9197c.png
[ebefd0f4b87f4f99818a1b83677d7e44.gif]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/24/bda8d028a7dd461a9abb6bc504dd2a40.png
[8ad6e51a4c1740439553ba25cfb57ee8.gif]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/24/f01ee99f9e6c453199e0692f50bf524d.png