function abre_img(url){
			window.open(url,'detalle_cuadro','toolbar=no, scrollbars=no, width=1, height=1, status=no, location=no, resizable=no');
		}
		function redimensiona_ventana(img){
			objImg=new Image();
			objImg.src=img;
			ancho=objImg.width+6;
			alto=objImg.height+29;
			self.resizeTo(ancho,alto);
		}