File Under: JavaScript

JavaScript Event – Blur

This code was written based on a template by John Resig. The original can be found at John Resig’s addEvent function website.

The code, and the template, are referred to in Webmonkey’s JavaScript Events reference page. In this example, the onBlur event fires whenever a form field lose focus.

The Code

<html>

<head>

<script>

// addEvent function by John Resig:

// http://ejohn.org/projects/flexible-javascript-events/

function addEvent( obj, type, fn ) {

  if ( obj.attachEvent ) {

    obj['e'+type+fn] = fn;

    obj[type+fn] = function(){obj['e'+type+fn]( window.event );}

    obj.attachEvent( 'on'+type, obj[type+fn] );

  } else

    obj.addEventListener( type, fn, false );

}

</script>

</head>

<body>



<!-- HTML for example event goes here -->

<input id="myinput" type="text" />



<script>

// Script for example event goes here

addEvent(document.getElementById('myinput'), 'blur', function(event) {

	alert('The element lost focus (blurred)');

});

</script>

</body>

</html>

What it Looks Like