js操作单选按钮

原创于 2013-04-07 15:38:20 发布 · 1.2k 阅读

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<html>
	<head>
	
	<script language="javascript">
		var checkValue = "";
		var radios = document.getElementsByName("test");
		function nowChecked(){
			for(var i=0;i<radios.length;i++){
				if(radios[i].checked){
					checkValue = radios[i].value;
				}
			}
		}
		function change(n){
			
			//alert("checkValue:"+checkValue+"  n:"+n);
			if(checkValue != n){
			
				if(confirm("确认修改？")){
					radios[n].checked =true;
					nowChecked();
				}else{
					radios[checkValue].checked = true;
				}
			}
		}
	</script>
	</head>
	
	<body onload="nowChecked()">
		<input type="radio" name="test" value="0" checked="checked" onclick="change(0)"/>是
		<input type="radio" name="test" value="1" onclick="change(1)"/>否
	</body>

</html>