用CSS实现字体描边

<style type="text/css">
body {
    font:12px "Verdana";
    filter:alpha(style=1,startY=0,finishY=100,startX=100,finishX=100);
    background-color:#3366cc;
}
span {
    position:absolute;
    padding:4px;
    filter:
        Dropshadow(offx=1,offy=0,color=white)
        Dropshadow(offx=0,offy=1,color=white)
        Dropshadow(offx=0,offy=-1,color=white)
        Dropshadow(offx=-1,offy=0,color=white);
}
#english {
    font-size:9px;
}
</style>
<span id="english">This is the prospect of filter - dropshadow.</span>
<br><br>
<span>中文描边效果</span>