这个代码怎么回事？

thisform.label1.visible.=.f.
thisform.label2.visible.=.f.
thisform.text1.value.=int(rand()*10)
thisform.text2.value.=int(rand()*10)
thisform.text3.value.=int(rand()*10)
if thisform.text1.value=7.or.thisform.text2.value=7.or.thisform.text3.value=7
thisform.label1.visible.=.t.
else
thisform.label2.visible.=.t.
endif