使图片自适应div大小

  <img src=“” onload="javascript:if(this.height>MaxHeight)this.height=MaxHeight;if(this.width>MaxWidth) this.width=MaxWidth;" alt="<%#Eval("description") %>" title = "<%#Eval("description") %>" />

 <script type="text/javascript">
    var MaxHeight=120; //图片最大高度
var MaxWidth=240; //图片最大宽度

</scirpt>