$(document).delegate(".class_name", "mouseout", function () {
$("#qrcode").hide();
});
$(document).delegate("#id_name", "mouseout", function () {
$("#qrcode").hide();
});
$(document).delegate("tag_name", "mouseout", function () {
$("#qrcode").hide();
});
blur
focus
focusin
focusout
load
resize
scroll
unload
click
dblclick
mousedown
mouseup
mousemove
mouseover
mouseout
mouseenter
mouseleave
change
select
submit
keydown
keypress
keyup
error
contextmenu