<!DOCTYPE HTML PUBLIC "
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
</head>
<body>
<script language="JavaScript">
<!
function checkselect(objname){
o = document
t = document
var count=
var intvalue="";
for(i=
if(o
intvalue+=o
count++;
}
}
t
alert(count);
}
//
</script>
<select name="objsel" size=
<option value="
<option value="
<option value="
<option value="
<option value="
<option value="
</select>
<input type="button" onclick="checkselect(
選中的項目
</body>
</html>
From:http://tw.wingwit.com/Article/program/Java/JSP/201311/20254.html