Order Tracking Number Lookup

This code provides a user interface for tracking packages. The user enters a tracking `num` into the text field and clicks the "TRACK" button. The `doTrack` function then uses the 17track.net API to retrieve and display the tracking information. The tracking results are displayed within the `YQContainer` div.

The `YQV5.trackSingle` function offers several configuration `optional` parameters. `YQ_ContainerId` is required and specifies where the tracking information will be displayed. `YQ_Height` is `optional` and controls the `height` of the tracking information display, with a maximum `height` of 800 pixels. `YQ_Fc` is `optional` and allows the user to select a specific carrier; by default, the system automatically identifies the carrier. `YQ_Lang` is `optional` and sets the user interface language. Finally, `YQ_Num` is required and represents the tracking `num` that the user entered. This can be valuable if you are sending items such as `jewelry`.