checkbox练习

r囧r小猫 2022-05-14 12:42 185阅读 0赞

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
    <title>无标题文档</title>
    
    <script type="text/javascript">
    
    function getSum()
    {
    	var items = document.getElementsByName("item");
    	var sum = 0;
    	for(var x = 0; x < items.length; x++)
    	{
    		if(items[x].checked)
    		{
    			sum += parseInt(items[x].value);
    		}
    	}
    	var str = sum + "元";
    	document.getElementById("sumid").innerHTML = str.fontcolor('red');
    }
    
    function checkAll(node)
    {
    	var items = document.getElementsByName("item");
    	for(var x = 0; x < items.length; x++)
    	{
    		items[x].checked = node.checked;
    	}
    }
    </script>
    </head>
    
    <body>
    
    <div>商品列表</div>
    
    <input type="checkbox" name="all" οnclick="checkAll(this)" />全选<br />
    <input type="checkbox" name="item" value="3000" />笔记本电脑3000元<br />
    <input type="checkbox" name="item" value="3000" />笔记本电脑3000元<br />
    <input type="checkbox" name="item" value="3000" />笔记本电脑3000元<br />
    <input type="checkbox" name="item" value="3000" />笔记本电脑3000元<br />
    <input type="checkbox" name="item" value="3000" />笔记本电脑3000元<br />
    <input type="checkbox" name="item" value="3000" />笔记本电脑3000元<br />
    <input type="checkbox" name="all" οnclick="checkAll(this)" />全选<br />
    <input type="button" value="总结额：" οnclick="getSum()" /><span id="sumid"></span>
    
    </body>
    </html>

运行结果：

![1354525840_5578.jpg][]

[1354525840_5578.jpg]: https://img-my.csdn.net/uploads/201212/03/1354525840_5578.jpg