<HTML>
<HEAD>
<META http-equiv="content-type" content="text/html; charset=shift_jis">
<SCRIPT language="javascript" type="text/javascript">
function CheckData() {
if ( document.getElementById("in1").value == '' ) {
alert( "必須入力です " );
return false;
}
if ( document.getElementById("in2").value == '' ) {
alert( "必須入力です " );
return false;
}
alert( document.getElementById("in3").value );
return true;
}
</SCRIPT>
</HEAD>
<BODY>
<FORM onSubmit='return CheckData()'>
<INPUT type="text" name="field1" id="in1">
<INPUT type="text" name="field2" id="in2">
<INPUT type="submit" name="send" value="送信" id="in3">
</FORM>
</BODY>
</HTML>
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