JS gets modified input text box-JS Tutorial-php.cn

JS gets modified input text box

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Release： 2018-06-09 15:49:31

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This time I will bring you JS to get and modify the input text box. What are the precautions for JS to get and modify the input text box? The following is a practical case, let's take a look. z

The example in this article describes how to simply obtain and modify the content of the input text box using JS. Share it with everyone for your reference, the details are as follows:

1 Introduction

To get the text box and modify its content, you can use getElementById( ) method to achieve.

getElementById()The method can get the HTML tag by the specified id and return it.

Syntax:

sElement=document.getElementById(id)

sElement: Used Receives an object returned by this method.

id: Used to set the id value that needs to be obtained from the HTML tag.

Second Application

Get the text box and modify its content

It will be displayed in the text box after the page is loaded "Initial text content", the content in the text box will be changed when the button is clicked.

Three Code

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>获取文本框并修改其内容</title>
</head>
<body>
<script language="javascript">
 <!--
 function c1()
 {
 var t=document.getElementById("txt");
 t.value="www.jb51.net 修改文本内容"
 }
 -->
</script>
<input type="text" id="txt" value="初始文本内容" size="30"/>
<input type="button" value="更改文本内容" name="btn" onclick="c1();" />
</body>
</html>

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I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the PHP Chinese website!