function NewWindow(mypage, myname, w, h, scroll) {

var scrw = screen.Width 
var scrh = screen.Height 
if ( scrw == "800" || scrw == "1024" )
{
var w=screen.availWidth-10;
var h=screen.availHeight-10;
var winl = 0;
var wint = 0;
}	 
else {	
var winl = (screen.width - w) / 2;
var wint = (screen.height - h) / 2;
}

winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable=yes'
win = window.open(mypage, myname, winprops)
if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}