Why doesn't the following Javascript code (to set CSS style) work?

Question

I'm trying to set the CSS style of an object with the following:

document.getElementById(obj).style='font-weight:bold; color:#333;';

but it's not working. Does anyone have any idea why?

Answer 1

you can separate

document.getElementById(obj).style.fontWeight='bold';
document.getElementById(obj).style.color='#333';

Answer 2

您需要将样式的基础cssText设置为以下内容：

document.getElementById('xx').style.cssText='font-weight:bold; color:#333;';

Answer 3

文档的样式属性是一个对象，请在W3school上参考HTML DOM样式对象