var newwindow;
function poptastic(url)
{
	newwindow=window.open(url,'name','height=400,width=450');
	if (window.focus) {newwindow.focus()}

}
/*

height
    Defines the height of the window in pixels. Percentage values don't work.
width
    Defines the width. Again, you'll have no joy with percentages.
left
    Supported by version 4 browsers and above, this sets how far removed the window appears from the left of the screen. In pixels.
top
    Partner to left, this pushes the window off the top of the screen.
resizable
    Set to true or false, this may allow the user to resize the window.
scrollbars
    Another Boolean value, this adds scrollbars to the new window. If your content may be longer then the dimensions you've specified, make sure this is set to yes.
toolbar
    Specifies whether the basic back/forward toolbar should be visible. If there are links to follow in your new page, set this to yes.
menubar
    Specifies whether the main toolbar (File, Edit, ...) is shown.
location
    Specifies whether the location toolbar (address bar) is shown.
status
    Specifies whether the new window can have a status bar. Best set to yes. For security reasons, Mozilla-based browsers always show the status bar.
directories
    Specifies whether the directories toolbar is shown (Links toolbar in IE).
fullscreen
    Internet Explorer-only Boolean attribute which may open the window in fullscreen. It's annoying — don't use it.
dependent
    Netscape 4-only attribute which makes the popup dependent on the status of the main window. If the main window is closed, the popup closes with it.
screenX & screenY
    Old Netscape attributes for defining the window's position on the page. Use left and top in their place.

So, a fully kitted-out new window might look more like this:

  newwindow=window.open(url,'name','height=500,width=400,left=100,
  top=100,resizable=yes,scrollbars=yes,toolbar=yes,status=yes');
*/