*/
$.fn.firstTabIndex = function() {
var minTabIndex = null;
- $(this).find( '[tabindex]' ).each( function( i ) {
+ $(this).find( '[tabindex]' ).each( function() {
var tabIndex = parseInt( $(this).attr( 'tabindex' ), 10 );
// In IE6/IE7 the above jQuery selector returns all elements,
// becuase it has a default value for tabIndex in IE6/IE7 of 0
- // (rather than null/undefined). Therefore check "> 0" as well
- if ( tabIndex > 0 ) {
+ // (rather than null/undefined). Therefore check "> 0" as well.
+ // Under IE7 under Windows NT 5.2 is also capable of returning NaN.
+ if ( tabIndex > 0 && !isNaN( tabIndex ) ) {
+ // Initial value
if ( minTabIndex === null ) {
minTabIndex = tabIndex;
} else if ( tabIndex < minTabIndex ) {
*/
$.fn.lastTabIndex = function() {
var maxTabIndex = null;
- $(this).find( '[tabindex]' ).each( function( i ) {
+ $(this).find( '[tabindex]' ).each( function() {
var tabIndex = parseInt( $(this).attr( 'tabindex' ), 10 );
- if ( maxTabIndex === null ) {
- maxTabIndex = tabIndex;
- } else if ( tabIndex > maxTabIndex ) {
- maxTabIndex = tabIndex;
+ if ( tabIndex > 0 && !isNaN( tabIndex ) ) {
+ // Initial value
+ if ( maxTabIndex === null ) {
+ maxTabIndex = tabIndex;
+ } else if ( tabIndex > maxTabIndex ) {
+ maxTabIndex = tabIndex;
+ }
}
} );
return maxTabIndex;