if (document.images) {
     button1 = new Image
     button2 = new Image
	 button3 = new Image
     button4 = new Image
	 button5 = new Image
     button6 = new Image
	 button7 = new Image
     button8 = new Image
	 button9 = new Image
     button10 = new Image
	 button11 = new Image
     button12 = new Image

     button1.src = "images/sg.jpg"
     button2.src = "images/sg2.jpg"
	 button3.src = "images/oferta.jpg"
     button4.src = "images/oferta2.jpg"
	 button5.src = "images/promocje.jpg"
     button6.src = "images/promocje2.jpg"
	 button7.src = "images/dofinansowanie.jpg"
     button8.src = "images/dofinansowanie2.jpg"
	 button9.src = "images/galeria.jpg"
     button10.src = "images/galeria2.jpg"
	 button11.src = "images/kontakt.jpg"
     button12.src = "images/kontakt2.jpg"
 }