<HTML>
<HEAD>
<META http-equiv="content-type" content="text/html; charset=shift_jis">
<SCRIPT language="javascript" type="text/javascript">
function CheckData() {
if ( document.getElementsByName("field1")[0].value == '' ) {
alert( "必須入力です " );
return false;
}
if ( document.getElementsByName("field2").item(0).value == '' ) {
alert( "必須入力です " );
return false;
}
return true;
}
</SCRIPT>
</HEAD>
<BODY>
<FORM onSubmit='return CheckData()'>
<INPUT type="text" name="field1">
<INPUT type="text" name="field2">
<INPUT type="submit" name="send" value="送信">
</FORM>
</BODY>
</HTML>
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