html, body { height: 100%; padding: 0; margin: 0; }
div { width: 50%; height: 50%; float: left; }
#div1 { background-image: url(tajmahal.jpg);}
#div2 { background: url(gatewayofindia.jpg); }
#div3 { background: url(kumbhalgarh.jpg); }
#div4 { background: url(ashokapillar.jpg); }