HTML onblur attribute


The purpose of the HTML onblur attribute is to indicate the user agent that the element has lost focus. The value of this attribute points to a script, which is executed when the element loses focus.

Supported elements

HTML onblur attribute supports a, area, button, input, label, select, textarea elements.

onblur can be effectively applied on form elements.


<ElementName onblur="value" >.....</ElementName>

Type of value



A script which is to be executed.

Default value

There is no default value of HTML onblur attribute.

Supported doctypes

HTML 4.01 strict, HTML 4.01 transitional, HTML 4.01 frameset.

Example of HTML onblur attribute with form elements

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Example of HTML onblur attribute with form elements</title>
<form name="onblur_example" action=""> 
Name : <input type="text" name="name" onblur="alert('name field has lost focus')"><br>
<label>Favorite Sports </label> 
<select name="favourite_sports" onblur="alert('favourite_sports has lost focus')">
<option value="Soccer">Soccer</option>
<option value="Hockey">Hockey</option>
<option value="Tennis">Tennis</option> 
<option value="Golf">Golf</option> 
<label>Describe yourself in short : </label>   <br><textarea cols="10" rows="10" name="describe_ yourself" onblur="alert('describe_ yourself has lost focus')">   </textarea><br>
<button type="button" name="submit">Submit</button>


html onblur attribute with form elements

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Example of HTML onblur attribute with form elements

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