(function($){
$.fn.resizeImageByScale=function(options){
var defaults={"maxWidth":100,"maxHeight":100};
$.extend(defaults,options);
return this.each(function(){
var obj=$(this);
var t=new Image();
$(t).load(function(){
var t1=this;
var toheight=defaults.maxHeight;
var towidth=defaults.maxWidth;
var aWidth=Math.round((t1.width/towidth)*10000);
var aHeight=Math.round((t1.height/toheight)*10000);
if(aWidth<aHeight){
toheight=defaults.maxHeight;
towidth=Math.round(t1.width*defaults.maxHeight/t1.height);}
else{
towidth=defaults.maxWidth;
toheight=Math.round(t1.height*defaults.maxWidth/t1.width);}
obj.css({"width":towidth,"height":toheight});}).attr("src",obj.attr("src"));});}})(jQuery);