css控制图片大小

<style type="text/css">
.imgcontrol {
border: 0;
margin: 0;
padding: 0;
max-width: 590px;
width: e­xpression(this . width > 590 ? "590px" : this . width);
max-height: 590px;
height: e­xpression(this . height > 590 ? "590px" : this . height);
}
</style>