if (document.images) {
img1on = new Image();	
img1on.src = "menu/images/menue_white_01.gif";
img2on = new Image();
img2on.src = "menu/images/menue_white_02.gif"; 
img3on = new Image();
img3on.src = "menu/images/menue_white_03.gif"; 
img4on = new Image();
img4on.src = "menu/images/menue_white_03.gif"; 
img5on = new Image();
img5on.src = "menu/images/menue_white_05.gif"; 
img6on = new Image();
img6on.src = "menu/images/menue_white_04.gif"; 
     
img1off = new Image();	
img1off.src = "menu/images/menue_01.gif";
img2off = new Image();
img2off.src = "menu/images/menue_02.gif"; 
img3off = new Image();
img3off.src = "menu/images/menue_03.gif"; 
img4off = new Image();
img4off.src = "menu/images/menue_03.gif"; 
img5off = new Image();
img5off.src = "menu/images/menue_05.gif"; 
img6off = new Image();
img6off.src = "menu/images/menue_04.gif"; 
}

       function imgOn(imgName) {
       if (document.images) {
       document [imgName].src = eval(imgName + "on.src");
                              
       }
       }

       function imgOff(imgName) {
       if (document.images) {
       document [imgName].src = eval(imgName + "off.src");
        
                                }
       }