<script type = "text/javascript" language = "javascript"> function clear1 () {if (konfirmasi ("Apakah Anda yakin ingin menghapus data?")) {document.main.text1.value = ""; }} </script> <body> <form name = "main"> <input type = "text" name = "text1"/> <input type = "tombol" name = "kirim" value = "hapus data" ontClick = "return clear1 ();"> </form> </body>