var map = "old";

function changenegg() {
if (map == "old") {
document.negg_pic.src="/images/tourguide/explore_2.png";
document.negg_pic.useMap = "#new";
map = "new";
} else {
document.negg_pic.src="/images/tourguide/explore_1.png";
document.negg_pic.useMap = "#old";
map = "old";
}


}