function valentine() {
if (document.all) {
if (document.all["ddr2"]) document.all["ddr2"].style.visibility=(document.all["ddr2"].style.visibility=="visible")?"hidden":"visible";
}else {
if (document.layers["ddr2"]) document.layers["ddr2"].visibility=(document.layers["ddr2"].visibility=="show")?"hide":"show";
}
}