if (document.images) {

menu_button1 = new Image
menu_button2 = new Image
menu_button3 = new Image
menu_button4 = new Image
menu_button5 = new Image
menu_button6 = new Image
menu_button7 = new Image
menu_button8 = new Image
menu_button9 = new Image
menu_button10 = new Image
menu_button11 = new Image
menu_button12 = new Image
menu_button13 = new Image
menu_button14 = new Image

menu_button1.src='images/news1.gif'
menu_button2.src='images/news0.gif'
menu_button3.src='images/o_rasie1.gif'
menu_button4.src='images/o_rasie0.gif'
menu_button5.src='images/galeria1.gif'
menu_button6.src='images/galeria0.gif'
menu_button7.src='images/goscie1.gif'
menu_button8.src='images/goscie0.gif'
menu_button9.src='images/kontakt1.gif'
menu_button10.src='images/kontakt0.gif'
menu_button11.src='images/mioty1.gif'
menu_button12.src='images/mioty0.gif'
menu_button13.src='images/przyjaciele1.gif'
menu_button14.src='images/przyjaciele0.gif'
}
else {

menu_button1=""
menu_button2=""
document.o1=""
menu_button3=""
menu_button4=""
document.o2=""
menu_button5=""
menu_button6=""
document.o3=""

menu_button7=""
menu_button8=""
document.o4=""

menu_button9=""
menu_button10=""
document.o5=""

menu_button11=""
menu_button12=""
document.o6=""

menu_button13=""
menu_button14=""
document.o7=""

}