<html> <head> <title></title> </head> <body> <script language="JavaScript"> <!-- function a(){ document.getElementById("1").disabled = true; } function b(){ document.getElementById("1").disabled = false; } // --> </script> <input type="button" value="button1" name="1" onclick="a()"> <input type="button" value="元に戻す" name="2" onclick="b()"> </body></html>