var bookPopoverTimer = null;
function sitb_showLayer(obj) {
  if(document.layer) {
	return; // netscape 4
  }

  if(bookPopoverTimer) {
    clearTimeout(bookPopoverTimer);
    bookPopoverTimer = null;
  }

  var sitb_lyr = sitb_getLayer(obj);
  if(!sitb_lyr) {
    return;
  }
  
  var sitb_img = sitb_getLayer('incasa');
  if(!sitb_img) {
    return;
  }

  var sitb_x, sitb_y, sitb_temp;
  if(sitb_img.x) {
    sitb_x = sitb_img.x;
  } else {
    sitb_temp = sitb_img;
    sitb_x = sitb_img.offsetLeft;
    while(sitb_temp.offsetParent) {
      sitb_temp = sitb_temp.offsetParent;
      sitb_x += sitb_temp.offsetLeft;
    }
  }
  if(sitb_img.y) {
    sitb_y = sitb_img.y;
  } else {
    sitb_temp = sitb_img;
    sitb_y = sitb_img.offsetTop;
    while(sitb_temp.offsetParent) {
      sitb_temp = sitb_temp.offsetParent;
      sitb_y += sitb_temp.offsetTop;
    }
  }

    sitb_lyr.style.visibility="visible";
    sitb_lyr.style.display="block";
    sitb_lyr.style.left = sitb_x + (sitb_img.width / 2);
    sitb_lyr.style.top = sitb_y + (sitb_img.height / 2);
}

function sitb_getLayer(obj) {
  if(document.layers) {
    return document.layers[obj];
  } else if(document.all && !document.getElementById) {
   return document.all[obj];
  } else if(document.getElementById) {
   return document.getElementById(obj);
  } else {
   return null;
  }
}

function sitb_hideLayer(obj) {

  var sitb_lyr = sitb_getLayer(obj);
 
  if(!sitb_lyr) {
    return;
  }

  if(document.layers) {
    sitb_lyr.visibility="hidden";
  } else {
    sitb_lyr.style.display="none";
    sitb_lyr.style.visibility="hidden";
  }

}

function sitb_doHide (obj) {
  if(document.layer) {
    return;
  }
  bookPopoverTimer = setTimeout('sitb_hideLayer("' + obj +'")', 10);  
}

if(document.layers) {
 sitb_hideLayer('bookpopover');
 
} else {

}