每个HMTL标签都有一个id属性
CSS用#main来取得这个标签,对样式进行修改
javascript用document.getElementById('main')来取得标签操作这个标签的内容
jQuery里更方便,${'main'}即可
结果:
this div target's id is main.
those words is created by javascript.
those words is created by javascript.