Page size? Do you mean specify the page size of your pop up window? If so this question would be better suited in a javascript forum, anyway you would do this like:
The following anchor tag fires a
JS function 'openNewWin'
------cut n paste start----------------------
<A HREF="#" onClick="openNewWin('pageNameOfNewWindow.asp','win dowName',300,300,250,250);">LinkText</a>
------cut n paste finish---------------
Put this in the head of your document(the parameters are self explanitory, change them(300,300,250,250 - as seen above) to 'resize' and 're position' your pop up window):
------cut n paste start--------------------
<script>
var newWindow
function openNewWin(pageURL, pageName, width, height, top, left)
{
newWindow = window.open(pageURL, pageName,"width=" + width + ",height=" + height + ",top=" + top + ",left=" + left + ",scrollbars=1, resizable=1,toolbar=0,location=0,status=0,menubar= 0");
newWindow.focus()
}
</script>
------cut n paste finish----------------------
NOTE: the newWindow.focus() in the above functions allows the window to be re focussed if lost behind any other active windows - very important for your web sites useability to the non savy web user (most users)
The above code if cut n pasted (dont forget to change the pagename in the achor tag) will produce a window that is:
300 pixels wide
300 pixels high
Positioned
250 pixels from the top of the browser window
250 pixels from the left of the browser window
Wind is your friend
Matt