<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="ja" lang="ja">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
<link href="tab.css" rel="stylesheet" type="text/css">
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
<script>
$(function(){
$("form").submit(function(){
if($("input[name='name']").val()==""){
$("input[name='name']").css("border","1px solid red")
.after("<span>名前入れろ</span>");
$("span").css({
"color":"red",
"font-weight":"bold"
});
return false;
}
});
});
</script>
</head>
<body>
<form method="post">
<dl>
<dt>お名前：<input type="text" name="name"></dt>
<dd><input type="submit" value="送信da!"></dd>
</dl>
</form>
</body>
</html>
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