<html> <meta charset="utf-8"/> <head> <title>js sample</title> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="sample.js"></script> </head> <body onload="sample()"> <input id="button_1" type="button" value="テスト1" /> <input id="button_2" type="button" value="テスト2" /> </body> </html> function sample(){ $("#button_1").click(function(){ alert('1'); }); $("#button_2").click(function(){ alert('a'); }); }