var addOverlay=function(n){$('<div class="overlay" />').appendTo($(n).css("position","relative"))},addBlankOverlay=function(n){$('<div class="overlay overlay-blank" />').appendTo($(n).css("position","relative"))},removeOverlay=function(n){$(".overlay",$(n)).remove();$(n).css("position","")},addPageOverlay=function(){addOverlay("body")},removePageOverlay=function(){removeOverlay("body")};