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Use JS to manipulate input text box content

php中世界最好的语言Original: 2018-05-02 09:48:115969browse

This time I will bring you the use of JS to operate the content of the input text box. What are the precautions for using JS to operate the content of the input text box? The following is a practical case, let's take a look.

1 Introduction

Getting the text box and modifying its content can be achieved using the

getElementById() method.

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

Syntax:

##sElement=

document.getElementById(id)<a href="http://www.php.cn/code/658.html" target="_blank"></a>

sElement

: Used to receive a object returned by this method.

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

Second ApplicationGet 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.

三码

<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>

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to the php Chinese website

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Use JS to manipulate input text box content

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