関連ワード:  what is the use of span in html    use of span in html    what is the function of span in html    what is the purpose of span in html    what is the use of span tag in html    what is the use of span element in html    what is the use of span tag in html with example    what is the use of span class in html    what is the use of spanning cells in html    what is the purpose of span tag in html