在div的onmouseover里面怎么改变字体样式

Question

在div的onmouseover里面怎么改变字体样式
比如 字体加粗 字号增大等

Answer 1

this.style.fontSize = 4;
this.style.fontWeight = 'border';

Answer 2

<div onmouseover="this.style.fontSize =5;this.style.fontWeight = 'border'; "/>