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使用js实现checkbox的全选与反选功能

2014-10-23 09:38 756 查看

效果如下图

代码如下

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
		<title>New Web Project</title>
		
		<script type="text/javascript">
			/**
			 * 全选
			 */
			function selectAll() {
				var languages = document.getElementsByName("language");
				
				for (var i=0; i < languages.length; i++) {
					var language = languages[i];
				  	language.checked = true;
				}			
			}
			/**
			 * 取消全选
			 */
			function deselectAll() {
				var languages = document.getElementsByName("language");
				
				for (var i=0; i < languages.length; i++) {
					var language = languages[i];
				  	language.checked = false;
				}	
			}
		
			/**
			 * 反选
			 */
			function inverse() {
				var languages = document.getElementsByName("language");
				
				for (var i=0; i < languages.length; i++) {
					var language = languages[i];
					
					if(language.checked) {
						language.checked = false;
					}else {
						language.checked = true;
					}
				}
			}
			
		</script>
	</head>
	<body>
		
		
		编程语言：<input type="checkbox" name="language" value="C" />C
		<input type="checkbox" name="language" value="C++" />C++
		<input type="checkbox" name="language" value="Java" />Java
		<input type="checkbox" name="language" value="Python" />Python<br/>
		
		<button onclick="selectAll();">全选</button>
		<button onclick="deselectAll();">取消全选</button>
		<button onclick="inverse();">反选</button>
		
	</body>
</html>

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