【玛卜码】利用JS实现全选、全不选和反选效果

489 05-10
实现界面
<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>练习</title>
		<script>	
			//全选和全不选
			function allCheck(name,boolValue) {
				var allvalue = document.getElementsByName(name); 
				//遍历判断
				for (var i = 0; i < allvalue.length; i++) {      
					if (allvalue[i].type == "checkbox")           
						allvalue[i].checked = boolValue;           
				}
			}
			//反选
			function reserveCheck(name){
				var revalue = document.getElementsByName(name); 
				//遍历判断
				for(i=0;i<revalue.length;i++){
			   		if(revalue[i].checked == true) 
						revalue[i].checked = false;
			  		else 
						revalue[i].checked = true;
				}
			}
		</script>
	</head>
	<body>
		<div >
    <label><input type="checkbox" name="choice" id="choice" width="30px;"/></label>全选
    <p></p>
    <label><input type="checkbox" name="choice" id="choice" width="30px;"/></label>吃
    <label><input type="checkbox" name="choice" id="choice" width="30px;"/></label>睡
    <label><input type="checkbox" name="choice" id="choice" width="30px;"/></label>学习
    <p></p>
    //给button添加JS
    <button onclick="javascript:allCheck('choice',true)">全选</button>
    <button onclick="javascript:allCheck('choice',false)">全不选</button>
    <button onclick="javascript:reserveCheck('choice')">反选</button>
	</div>
	</body>
</html>
标签： JavaScript