js 取消焦点如何用JS实现div失去焦点事件

如何用JS实现div失去焦点事件

1 2 3 4 5 6 7 8 9 10 11 12 13 14 <scriptsrc="js/jquery.js"></script> <script> $(function(){ ????$(".a").mouseover(function(){ ????????$(this).css("border-color",?"black"); ????}).mouseout(function(){ ????????$(this).css("border-color",?"transparent"); ????}); }); </script> <style> .a?{?padding:?50px;?background:?red;?width:?100px;?border:?5px?solid?transparent;?}? </style> <divclass="a"></div>