For instance , when you move into the second field on a form , auto - refresh updates the first field on the form , when you move to the third field , it updates the first and second fields , and so on 例如，当转移到一个表单上的第二个字段时， auto - refresh会更新表单上的第一个字段；当转移到第三个字段时，它会更新第一个和第二个字段，依此类推。
Remember , because we have set fs correctly , we can refer to the first field as 1 , the second field as 2 , etc . when doincome and friends are called , the functions can access the current values of curmonth , 2 , 3 and amount from inside the function 请记住，由于正确设置了fs ，可以用$ 1引用第一个字段，用$ 2引用第二个字段，依次类推。调用doincome ( )和其它函数时，这些函数可以从函数内部访问curmonth 、 $ 2 、 $ 3和金额的当前值。
