if(document.images){
img20 = new Image();img20.src = "Files/Navigation/B1_f.gif";img20Over = new Image();img20Over.src = "Files/Navigation/B1_f_active.gif";
imgL1 = new Image();imgL1.src = "Files/Navigation/B1.gif";imgL1Over = new Image();imgL1Over.src = "Files/Navigation/B1_active.gif";
imgL2 = new Image();imgL2.src = "Files/Navigation/2arrow.gif";imgL2Over = new Image();imgL2Over.src = "Files/Navigation/2arrow.gif";

}