自定义指定区域的文字大小

<div id=zoom>sdrrrrrrrrrrrrrrrrrrrrrrrrrrrrr</div>
【<A href="javascript:doZoom(16)">大</A> <A href="javascript:doZoom(14)">中</A> <A href="javascript:doZoom(12)">小</A>】
<SCRIPT language=JavaScript>
function doZoom(size){
document.getElementById('zoom').style.fontSize=size+'px'
}
</script>