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document.bt2.src="/skin/frontend/looksport/default/images/top_menu-vyrobky.png";}

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document.bt3.src="/skin/frontend/looksport/default/images/top_menu-referencie.png";}

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document.bt4.src="/skin/frontend/looksport/default/images/top_menu-kontakt.png";}

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document.bt6.src="/skin/frontend/looksport/default/images/top_menu-galeria.png";}