1.用onmouseout onmouseover 图像间相互变换：
<image src="img1" onmouseover="this.src='img2'" onmouseout="this.src='img1'">
2.onmouseover onmouseout 改变文字背景色：
<div width="100" height="100" onmouseover="style.backgroundColor='#fff'"
onmouseout="style.backgroundColor='#bbb'" bgcolor="#bbb">文字</div>
3..onmouseover onmouseout 改文字变背景图：
<div width="100" height="100" onMouseOver="this.background='1.gif'"
onMouseOut="this.background='2.gif'" background="2.gif">文字</div>