图片比例缩放控制

<li id="recordone_<?php echo $v['share_id'];?>">
<a href="index.php?act=member_snshome&op=goodsinfo&mid=<?php echo $v['share_memberid'];?>&id=<?php echo $v['share_id'];?>" title="<?php echo $v['snsgoods_goodsname']?>" class="pic">
<img src="<?php echo cthumb($v['snsgoods_goodsimage'],240,$v['snsgoods_storeid']);?>" style="vertical-align:middle;" onload="javascript:DrawImage(this,222,222);" width="222" height="222">
</a>
</li>

2、封装的js函数

//图片比例缩放控制
function DrawImage(ImgD, FitWidth, FitHeight) {
var image = new Image();
image.src = ImgD.src;
if (image.width > 0 && image.height > 0) {
if (image.width / image.height >= FitWidth / FitHeight) {
if (image.width > FitWidth) {
ImgD.width = FitWidth;
ImgD.height = (image.height * FitWidth) / image.width;
} else {
ImgD.width = image.width;
ImgD.height = image.height;
}
} else {
if (image.height > FitHeight) {
ImgD.height = FitHeight;
ImgD.width = (image.width * FitHeight) / image.height;
} else {
ImgD.width = image.width;
ImgD.height = image.height;
}
}
}
}