Javascript Reference - HTML DOM Input Button Object

The Input Button object represents an HTML <input> element with type="button".

Input Button Object Properties

Property	Description
autofocus	Sets or gets whether a button can automatically get focus when the page loads
defaultValue	Sets or gets the default value of a button
disabled	Enable or disable a button
form	Get a reference to the form that contains the button
name	Sets or gets the value of the button name
type	Get the element type for a button
value	Sets or gets the button value attribute

Standard Properties and Events

The Input Button object supports the standard properties and events.

Example

We can access an <input> element with type="button" by using getElementById().


<!DOCTYPE html>
<html>
<body>
<input type="button" id="myBtn" onclick="myFunction()" value="test">
<p id="demo"></p>
<!--from   w  w w.  j  av a 2  s.  c o  m-->
<script>
function myFunction() {
    var x = document.getElementById("myBtn").value;
    document.getElementById("demo").innerHTML = x;
}
</script>

</body>
</html>

The code above is rendered as follows:

Example 2

We can create an <input> element with type="button" by using the document.createElement() method.


<!DOCTYPE html>
<html>
<body>
<button onclick="myFunction()">test</button>
<script>
function myFunction() {<!--  w w w. j a  v  a2s  . c  o  m-->
    var x = document.createElement("INPUT");
    x.setAttribute("type", "button");
    x.setAttribute("value", "Click me");
    document.body.appendChild(x);
}
</script>
</body>
</html>

The code above is rendered as follows: