付款系统for循环+if

<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<script type="text/javascript">
		 var sum=0;
		    for (var a=1;a<=3;a++) {
	    	    var n=prompt("请输入密码");
	    	    sum++
		    	if(n=='admin123'){
		    		document.write('输入成功,请取款');
					break;
		    	}
		    	else{
		    		alert('你还有'+sum+'次机会');
		    	}
		    	if (sum==3) {
		    	    alert('账户冻结');
		    	}
		    }
	</script>
	<body>
	</body>
</html>

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转载自blog.csdn.net/weixin_43727538/article/details/84675683