A computer-implemented method for inputting data entries of a service for use with a portable electronic device having a touch screen. By detecting a continuous stroke moving on the touch screen to select desired items among multiple levels of menus which are displayed in a sequence for an object targeting to a service, the data entries according to the selected items are committed for the object when the continuous stroke ends. In addition, multiple items can be selected in one level of menu by using a pre-defined stroke indication in the continuous stroke. Furthermore, the selected items can be corrected by re-stroking back to the corresponding levels of menus.