<script type = "text/javascript"言語= "javascript"> function clear1（）{if（confism（ "データをクリアしたいの？"））{document.main.text1.value = ""; }} </script> <body> <form name = "main"> <input type = "text" name = "text1"/> <入力タイプ= "name" name = "" balue = "clear" onclick = "return clear1（）; </form> </body> </body>