<!DOCTYPE?HTML><html><head><meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8"?/><title>style樣式</title></head><body>??<h2?id="con">I?love?JavaScript</h2>??<p?id="con1">?JavaScript使網頁顯示動態效果并實現與用戶交互功能。</p>??<script?type="text/javascript">????var?mychar=?document.getElementById("con");????mychar.style.color="red";????mychar.style.backgroundColor="#ccc";????mychar.style.width="400px";????var?mysum=document.getElementById("con1");????mysum.style.color="blue";????mysum.style.fontSize="25";???</script></body></html>
2021-07-22
解決了，字體大小屬性值要加“px”