var win= 0;

function showButton(controller,action,gis){
	//alert(url);
	if( win == 0 ){
		win = new Window({className: "alphacube", title: "Agregar Contenido", resizable: false, destroyOnClose: true,
                      top:70, left:300, width:600, height:600,wiredDrag: true , 
                      url: "http://www.carlahurtado.com/content/add?controller="+controller+"&action="+action+"&gis="+gis, showEffectOptions: {duration:2}})
		win.show();             
		myObserver = {
	 	   onDestroy: function(eventName, contentWin) {
	 	     if (win == contentWin) {
	 	       win = 0;
	 	       Windows.removeObserver(this);
	 	     }
	 	   }
	 	 }
	  Windows.addObserver(myObserver);
        }
        
}