w = 600;
 h = 400;
 x = 10;
 y = 10;

var winProps = "resizable=1,scrollbars=1";
var args = "width=" + w + ",height=" + h
      + "," + winProps
      + ",screenx=" + x + ",screeny=" + y
      + ",left=" + x + ",top=" + y;

function mwin(){                                                               
winhandle=window.open('','gfnsdoc',args);                                      
winhandle.focus;                                                               
return true                                                                    
}