if(document.images) {
       obr1Off = new Image
       obr2Off = new Image
       obr3Off = new Image
       obr4Off = new Image
       obr5Off = new Image
       obr6Off = new Image
       obr7Off = new Image
       obr8Off = new Image
       obr9Off = new Image
              
       obr1Over = new Image
       obr2Over = new Image
       obr3Over = new Image
       obr4Over = new Image
       obr5Over = new Image
       obr6Over = new Image
       obr7Over = new Image
       obr8Over = new Image
       obr9Over = new Image
       
              
       obr1Off.src = "images/obrazek_1c.gif"
       obr2Off.src = "images/obrazek_2c.gif"
       obr3Off.src = "images/obrazek_3c.gif"
       obr4Off.src = "images/obrazek_4c.gif"
       obr5Off.src = "images/obrazek_5c.gif"
       obr6Off.src = "images/obrazek_6c.gif"
       obr7Off.src = "images/obrazek_7c.gif"
       obr8Off.src = "images/obrazek_8c.gif"
       obr9Off.src = "images/obrazek_9c.gif"
               
       obr1Over.src = "images/obrazek_1b.gif"
       obr2Over.src = "images/obrazek_2b.gif"
       obr3Over.src = "images/obrazek_3b.gif"
       obr4Over.src = "images/obrazek_4b.gif"
       obr5Over.src = "images/obrazek_5b.gif"
       obr6Over.src = "images/obrazek_6b.gif"
       obr7Over.src = "images/obrazek_7b.gif"
       obr8Over.src = "images/obrazek_8b.gif"
       obr9Over.src = "images/obrazek_9b.gif"
              
}      
else{
    obr1Over = ""
    obr1Off = ""
    document.arrow = ""
}



function SetClass (Element, Style){
         document.getElementById(Element).className = Style;
         }