JS限定手机版中图片大小随分辨率自动调整的方法

<script type="text/javascript">   var ObjImg = jQuery(".Dy_Content img");   for (var i = 0; i < ObjImg.length; i++) {     loadImage(ObjImg.eq(i));   }   function loadImage(Obj) {     var b_width = 320;     var img = new Image();     img.src = jQuery(Obj).attr("src");     if (img.complete) {       var i_width = img.width;       var i_height = img.height;       if (i_width > b_width) {         var bx = b_width / i_width;         jQuery(Obj).width(b_width);         jQuery(Obj).height((bx * i_height).toFixed(0));       }       return;     }     img.onload = function () {       var i_width = this.width;       var i_height = this.height;       if (i_width > b_width) {         var bx = b_width / i_width;         jQuery(Obj).width(b_width);         jQuery(Obj).height((bx * i_height).toFixed(0));       }     };   }; </script>