📄 7-18.html

📁 文件是《精通Javascript+jQuery》的书中实例

💻 HTML

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>下拉菜单，多选</title>
<style>
<!--
form{
	padding:0px; margin:0px;
	font:14px Arial;
}
p{
	margin:0px; padding:2px;
}
-->
</style>
<script language="javascript">
function checkMultiple(){
	var oForm = document.forms["myForm1"];
	var oSelectBox = oForm.constellation;
	var aChoices = new Array();
	//遍历整个下拉菜单
	for(var i=0;i<oSelectBox.options.length;i++)
		if(oSelectBox.options[i].selected)	//如果被选中
			aChoices.push(oSelectBox.options[i].text);	//压入到数组中
	alert("您选了：" + aChoices.join());	//输出结果
}
</script>
</head>
<body>
<form method="post" name="myForm1">
<label for="constellation">星座：</label>
<p>
<select id="constellation" name="constellation" multiple="multiple" style="height:180px;">
	<option value="Aries">白羊</option>
	<option value="Taurus">金牛</option>
	<option value="Gemini">双子</option>
	<option value="Cancer">巨蟹</option>
	<option value="Leo">狮子</option>
	<option value="Virgo">处女</option>
	<option value="Libra">天秤</option>
	<option value="Scorpio">天蝎</option>
	<option value="Sagittarius">射手</option>
	<option value="Capricorn">摩羯</option>
	<option value="Aquarius">水瓶</option>
	<option value="Pisces">双鱼</option>
</select>
</p>
<input type="button" onclick="checkMultiple()" value="查看选项" />
</form>
</body>
</html>

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