xxxxxxxxxx<html><head> <meta charset="utf-8"> <title>W3Cschool教程(w3cschool.cn)</title> </head><body><p>点击这里来创建变量，并显示结果。</p><button onclick="myFunction()">点击这里</button><p id="demo"></p><script>function myFunction(){ var carname="Volvo"; document.getElementById("demo").innerHTML=carname;}</script></body></html>