jquery validation engine example for file upload allowed extension
<script>
;(function($) {
$('input#submit').click(function() {
var file = $('input[type="file"]').val();
var exts = ['doc','docx','rtf','odt'];
// first check if file field has any value
if ( file ) {
// split file name at dot
var get_ext = file.split('.');
// reverse name to check extension
get_ext = get_ext.reverse();
// check file type is valid as given in 'exts' array
if ( $.inArray ( get_ext[0].toLowerCase(), exts ) > -1 ){
alert( 'Allowed extension!' );
} else {
alert( 'Invalid file!' );
}
}
});
})(jQuery);
</script>