<div style="border: 1 solid red;position: absolute;top:expression((this.parentelement.offsetheight-this.offsetheight)/2);left:expression((this.parentelement.offsetwidth-this.offsetwidth)/2);">我站在中央了<br>center</div>
</div>
<div style="border: 1 solid #c0c0c0;"><br><br><br><br><br><br><br><br>
<div style="border: 1 solid red;position: absolute;top:expression((this.parentelement.offsetheight-this.offsetheight)/2);left:expression((this.parentelement.offsetwidth-this.offsetwidth)/2);">我站在中央了<br>center</div>
</div>
