<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>onchange的使用方法</title>
<meta name="description" content="">
<meta name="keywords" content="">
<link href="" rel="stylesheet">
<script type="text/javascript">
function old_page()
{
window.location = "http://www.baidu.com"
}
function replace()
{
window.location.replace("http://www.baidu.com")
}
function new_page()
{
window.open("http://www.baidu.com")
}
</script>
</head>
<body>
<input type="button" onclick="new_page()" value="new_page"/>
<br />
<input type="button" onclick="old_page()" value="old_page"/>
<br />
<input type="button" onclick="replace()" value="replace"/>
<br />
<select onchange="window.location=this.value">
<option value="http://www.baidu.com">百度</option>
<option value="http://www.sina.com">新浪</option>
</select>
<br />
<select onchange="window.open(this.value)">
<option value="http://www.baidu.com">百度</option>
<option value="http://www.sina.com">新浪</option>
</select>
<br />
<select onchange="window.location.replace(this.value)">
<option value="http://www.baidu.com">百度</option>
<option value="http://www.sina.com">新浪</option>
</select>
</body>
</html>
