var image="";
if (screen.width == 640) {
image="bg640.gif";
}
else if (screen.width == 800) {
image="bg800.gif";
}
else if (screen.width == 1024) {
image="bg1024.gif";
}
else if (screen.width == 1152) {
image="bg1152.gif";
}
else if (screen.width == 1280) {
image="bg1280.gif";
}
else if (screen.width == 1600) {
image="bg1600.gif";
}
else if (screen.width == 1920) {
image="bg1920.gif";
}
else {
image="bgblack.gif";
}