Please visit the folllowing site for understanding.
u can see on the left is the list of PIZZA stors. Once u select a PIZZA store, its map is shown at the right. ON THE LEFT SIDE THAT PARTICULAR PIZZA STORE IS HIGHLIGHTED WITH LIGHT GRAY COLOR. AND WEHN U SELECT ANOTHER STORE, THEN THIS WIL BECOME NORMAL AND THE NEW SELECTED ONE WILL BE HIGHLIGHTED.
PLease help with this.