HTML 유효성 테스트를 했더니,

1. Error: A document must not include both a meta element with an http-equiv attribute whose value is content-type, and a metaelement with a charset attribute.

   From line 6, column 1; to line 6, column 67

   ="utf-8">↩<meta http-equiv="content-type" content="text/html; charset=utf-8">↩<meta

2. Error: script element between head and body.

   From line 18, column 1; to line 18, column 31

   ↩↩</head>↩<script type="text/javascript">↩// 자바

3. Fatal Error: Cannot recover after last error. Any further errors will be ignored.

   From line 18, column 1; to line 18, column 31

   ↩↩</head>↩<script type="text/javascript">↩// 자바

위와 같은 에러 문구가 뜨는데,

바람직하게 고쳐주려면 어떻게 변경해줘야 할까요?