this.border bei onmouseover

[Hans Wurst]

<img onmouseover="this.border='#0000FF';" ...>

<img onmouseover="this.border.style='#0000FF';" ...>
<img onmouseover="this.border.style.color='#0000FF';" ...>

Wie wärs mit:  
`<img onmouseover="this.style.border='1px solid #0000FF;'" ...>`{:.language-javascript}