TR_ElementId ： Required, Specify float position element ID.
TR_Width ： Optional, Specify tracking result width, min width 600px, default is filled the container.
TR_Height ：Optional, Specify tracking result height, max height 800px, default is filled the container.
TR_ExpressCode： Optional, Select carrier, default is auto-identify.
TR_Lang ： Optional, Specify UI language, default language is automatically detected based on browser settings. en=English, cn=简体中文, tw=繁體中文, it=Italiano, es=Español,  ru=Русский

TR_Num ：Required, Specify number need to be tracked.
method call:  doTrack('tracking number')