W3School TIY Editor
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<html> <head> <script type="text/javascript" src="/jquery/jquery.js"></script> <script type="text/javascript"> $(document).ready(function(){ $("input").focus(function(){ $("input").css("background-color","#FFFFCC"); }); $("input").blur(function(){ $("input").css("background-color","#D6D6FF"); }); }); </script> </head> <body> Enter your name: <input type="text" /> <p>请在上面的输入域中点击,使其获得焦点,然后在输入域外面点击,使其失去焦点。</p> </body> </html>