select动态增加option

时间：2023-03-09 16:18:43
select动态增加option 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" 

"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">

<head>

<title>option creation</title>

<meta http-equiv="Content-Type"

	content="application/xhtml+xml; charset=utf-8" />

<style type="text/css">

/*<![CDATA[*/

body {

	background-color: #ddd;

}

#container {

	width: 400px;

	text-align: center;

	padding: 20px 0px;

	border: 3px double #000;

	background-color: #ccc;

	margin: 30px auto;

}

/*//]]>*/

</style>

<script type="text/javascript">

//<![CDATA[

  var opts=3  /*number of original options*/

  var df=document.forms;

function optionAdd(num) { 

   opts=opts+num;

   df[0][0].options.length=opts;

   df[0][0].options[opts-1].innerHTML=df[0][1].value;

   df[0][1].value=""

 }

//]]>

</script>

</head>

<body>

	<form action="#">

		<div id="container">

			<select>

				<option>- - - - - - - -</option>

				<option>option one</option>

				<option>option two</option>

			</select> <input type="text" /> <input type="button" value="new option"

				onclick="optionAdd(1)" />

		</div>

	</form>

</body>

</html>

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