javascript - i get error in jquery of piczoomer -

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i error in line of pic zoomer js jquery.piczoomer.js

picbdoffset = {x:$picbd.offset().left,y:$picbd.offset().top};

error :

  uncaught typeerror: cannot read property 'left' of undefined 

picbdoffset = {x:$picbd.offset()?$picbd.offset().left:0,y:$picbd.offset()?$picbd.offset().top:0};

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