var previousClickedRegion = null;

function setVisible(obj) {
    if (previousClickedRegion != null) {
        previousClickedRegion.style.visibility = (previousClickedRegion.style.visibility == 'hidden') ? 'hidden' : 'hidden';
    }
    obj = document.getElementById(obj);
    obj.style.visibility = (obj.style.visibility == 'visible') ? 'hidden' : 'visible';
    previousClickedRegion = obj;
}
// function placeIt(obj) {
// 
//     obj = document.getElementById(obj);
//     if (document.documentElement) {
//         theLeft = document.documentElement.scrollLeft;
//         theTop = document.documentElement.scrollTop;
//     }
//     else if (document.body) {
//         theLeft = document.body.scrollLeft;
//         theTop = document.body.scrollTop;
//     }
//     theLeft += 20;
//     theTop += 70;
//     obj.style.left = theLeft + 'px';
//     obj.style.top = theTop + 'px';
//     setTimeout("placeIt('obj')", 500);
// }
// window.onscroll = setTimeout("placeIt('obj')", 500);