According to MDN you can only have 3 parameters in that function.
window.open(strUrl, strWindowName[, strWindowFeatures]);
Demo here - I droped the '_blank'
and made a demo with small window just to make the scrollbar showup.
So you can use:
window.open("someurl", 'windowOpenTab', 'scrollbars=1,resizable=1,width=1000,height=580,left=0,top=0');