How to add another statement in IF with JQUERY [duplicate]

This question already has an answer here:

• The entity name must immediately follow the '&' in the entity reference 5 answers

I combine primefaces with SVG and onclick. If I write just the first part "if($(window).width()>800){PF('dlg_p').show();}" there is no problem, but if I want to add another restriction don't work.

<svg width="200" height="210" onclick="if($(window).width()>600)&&($(window).height()>600){PF('dlg_s').show();}">

But the console gives me an error I can't solve:

Error Traced [line 313] The entity name must appear immediately after '&' in the entity reference.