学步园

<script>
function doZoom1(size,value)
{

var zoom=document.getElementById(value);
zoom.style.fontSize=size+'px';
zoom.style.color='red';
}
</script>

<a href="javascript:doZoom1(10,'Zoom1')">小</a>
<a href="javascript:doZoom1(100,'Zoom2')">中</a>
<a href="javascript:doZoom1(200,'Zoom3')">大</a>
<div id="Zoom1"> 测试文字1 </div>
<div id="Zoom2"> 测试文字2 </div>
<div id="Zoom3"> 测试文字3 </div>