When i'm calling this code in the link of a chart in apex
javascript:window.open('http://google.pt','mywindow','width=400,height=200', 'bReplace=true');
it opens a new window with google page but puts the chart page with a blank page with [object Window]
wrote on it
How can i maintain the chart page?
You need to force the expresion to not return a value:
javascript:void(window.open(...))