function handleEnter (field, event) {
        var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
        if (keyCode == 13) {
            var i;
            for (i = 0; i < field.form.elements.length; i++)
                if (field == field.form.elements[i])
                    break;
            i = field.form.elements[i].tabIndex + 1;
            for( j = 0 ; j < field.form.elements.length; j++){
                if( field.form.elements[j].tabIndex == i){
                    break;
                }
            }
            field.form.elements[j].focus();
            return false;
        }
        else
        return true;
    }