📄 计算多少项目被选中.txt

📁 C# 是创新性的新式编程语言

💻 TXT

字号:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
	<head>
		<title></title>
		<meta name="GENERATOR" content="Microsoft Visual Studio .NET 7.1">
		<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
		<script language=javascript>
			function howMany(selectObject)
			{
				var num=0;
				for(var i=0;i<selectObject.options.length;i++)
					if(selectObject.options[i].selected==true)
						num++;
				return num;
			}
		</script>
	</head>
	<body>
	<form name="selectForm">
	<br>
	<select name="country" multiple>
	<option>USA</option>
	<option>China</option>
	<option>Japan</option>
	</select>
	<p>
	<input type="button" value="How?" onClick="alert('num:'+howMany(document.selectForm.country))">
	</form>
	</body>
</html>

⌨️ 快捷键说明

复制代码 Ctrl + C

搜索代码 Ctrl + F

全屏模式 F11

切换主题 Ctrl + Shift + D

显示快捷键 ?

增大字号 Ctrl + =

减小字号 Ctrl + -