1. web_url ()
Generally get requests to use this
2. web_submit_form（）
Automatically detect whether the current page is present form, if there is data to transmit will later ITEMDATA
3. web_submit_data () ------- This setting is recommended
No need to support the previous page, send it directly to the corresponding page data. Data in hidden form will be recorded as ITEMDATA data submitted to the server.
4. web_custom_request（）
When the request is rather special, VuGen recorded several functions can not be used above, it will use this function.