// JavaScript Document
function PopUp(img){ 
       foto1= new Image(); 
       foto1.src=(img); 
       Control(img); 
} 
  
function Control(img){ 
       if((foto1.width!=0)&&(foto1.height!=0)){ 
              verFoto(img); 
       } 
  else{ 
       funcion="Control('"+img+"')"; 
              intervalo=setTimeout(funcion,20); 
       } 
} 
function verFoto(img){ 
       ancho=foto1.width+20; 
       alto=foto1.height+20; 
	//    derecha=(screen.width)/2; 
   	//	arriba=(screen.height)/4; 
		derecha=-100;
		arriba=200;
       cadena="width="+ancho+",height="+alto+"left="+derecha+",top="+arriba;  
//	   moveTo(screen.width/2, screen.height/2);
//document.write(derecha);
	   ventana=window.open(img,"",cadena); 
  }