function imageResize(obj,w,h){
	var ow = $(obj).width();
	var oh = $(obj).height();
	var per=1;
	if(ow>oh){
		per = h / oh;
	}else{
		per = w / ow;
	}
	$(obj).css("width",Math.ceil(per*ow)+"px");
	$(obj).css("height",Math.ceil(per*oh)+"px");
}