获取form对象

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

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

 <head>

  <title> new document </title>

  <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />

  <style type="text/css"></style>

  <script type="text/javascript">

  window.onload=function(){

        //获取name=form1的元素对象

        var theForm = document.form1;

        //给form对象添加属性

        theForm.method ="post";

        theForm.action ="login.php";

        //theForm.entype="application/x-www-form-urlencoded";

        //输出当前的编码方式

        //window.alert(theForm.enctype);

  }

  </script>

 </head>

 <body>

 <form name="form1">

 用户名：<input type="text" name="username" />

 密码：<input type="password" name="userpwd" />

 <input type="submit" value="提交表单" />

</form>

 </body>

</html>
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