How to advance to the next form input when the current input has a value?

Question

I am having a form with lots of entries. I would like to change my focus to the next textbox, once I entered the value in the current textbox. and want to continue this proc

Answer 1

function nextField(current){
    for (i = 0; i < current.form.elements.length; i++){
        if (current.form.elements[i].tabIndex - current.tabIndex == 1){
            current.form.elements[i].focus();
            if (current.form.elements[i].type == "text"){
                current.form.elements[i].select();
            }
        }
    }
}

This, when supplied with the current field, will jump focus to the field with the next tab index. Usage would be as follows