function ResizeImg(object,swidth,sheight){
	var image=new Image();
	image.src=object.src;
	image.width=object.width;
	image.height=object.height;
	if(image.width>image.height){
		if(image.width>=swidth){
	   		object.width=swidth;
	   		object.height=image.height*swidth/image.width;
	   }
	}else{
		if(image.height>=sheight){
	   		object.height=sheight;
	   		object.width=image.width*sheight/image.height;
	   }
	}
}