Focus the next input with down arrow key (as with the tab key)

Question

I have a huge entry form and fields for the users to input.

In the form user use tab key to move to next feild,there are some hidden fields and readonly textboxe

Answer 1

This is my final working code:

$('input[type="text"],textarea').keydown( function(e) {
    var key = e.charCode ? e.charCode : e.keyCode ? e.keyCode : 0;

    if(key == 40) {
        e.preventDefault();
        var inputs = $(this).parents('form').find(':input[type="text"]:enabled:visible:not("disabled"),textarea');

        inputs.eq( inputs.index(this)+ 1 ).focus();
        inputs.eq( inputs.index(this)+ 1 ).click();
    }
});