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js获取form的方法_javascript技巧

WBOY
Release： 2016-05-16 16:00:39
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本文实例讲述了js获取form的方法。分享给大家供大家参考。具体如下：

先来看下面代码：

 
 
 
window.onload=function(){ 
   var f1=document.f1; 
   var f2=document.forms[1]; 
 alert(f2.id); 
  var f3=document.forms['f1']; 
}
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操作表单：
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js操作form的三种方式：

1. 利用表单在文档中的索引或表单的name属性来引用表单

复制代码 代码如下:
document.forms[i]  //得到页面中的第i个表单
document.forms[fromName] //得到页面中相应name的表单

2. 利用表单的id属性

复制代码 代码如下:
document.getElementById(formId);

3.

复制代码 代码如下:
document.formName;//最为常用的一种方式

希望本文所述对大家的javascript程序设计有所帮助。

Related labels：
js
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