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Common examples of document.getElementById in JavaScript

Source: Internet
Author: User
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Changing HTML Properties

To change the attributes of an HTML element, use this syntax:

The code is as follows Copy Code
document.getElementById (ID). attribute=new value

This example changes the SRC attribute of the element:

The code is as follows Copy Code



<script type= "Text/javascript" >
document.getElementById ("image"). src= "Landscape.jpg";
</script>

Change HTML Style

To change the style of HTML elements, use this syntax:

The code is as follows Copy Code


document.getElementById (ID). style.property=new style

The following example will change

The style of the element:

Hello world!

The code is as follows Copy Code
<script type= "Text/javascript" >
document.getElementById ("P2"). style.color= "Blue";
</script>

document.getElementById (...) ' is empty or not an object

The code is as follows Copy Code

<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en"
"Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >

    <title> Untitled page </title>
    <style type= "text/css"
    body
     {
        font-family: "Song body";
         FONT-SIZE:12PX;
   }
    </style>
    <script language= "JavaScript type=" Text/javascript
    document.getElementById ("Divtest"). Innerhtml= "Hello World";
   / When the page finishes loading this JavaScript code, it starts running, but the following ID divtest div tag is not loaded, so it cannot be found
    </script>
</ Head>
<body>
    <div id= "divtest"
    </div>
</body>

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