if(document.images){
imgL1 = new Image();imgL1.src = "/Files/Navigation/ds_menu_niv1.gif";imgL1Over = new Image();imgL1Over.src = "/Files/Navigation/ds_menu_niv1.gif";
imgL2 = new Image();imgL2.src = "/Files/Navigation/ds_menu_niv2.jpg";imgL2Over = new Image();imgL2Over.src = "/Files/Navigation/ds_menu_niv2.jpg";
imgL3 = new Image();imgL3.src = "/Files/Navigation/ds_menu_niv3.jpg";imgL3Over = new Image();imgL3Over.src = "/Files/Navigation/ds_menu_niv3.jpg";

}