function popup(mypage, myname, w, h, bResize, bScroll, winLeftPos, winTopPos) {
	if (myname == undefined) myname = '';
	if (w == undefined) w = '600';
	if (h == undefined) h = '500';
	if (bResize == undefined) bResize = 'Yes';
	if (bScroll == undefined) bScroll = 'Yes';
	var winl = (winLeftPos == undefined)?(screen.width - w) / 2:winLeftPos;
	var wint = (winTopPos  == undefined)?(screen.height - h) / 2:winTopPos;
	winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',resizable='+bResize+',scrollbars='+bScroll
	win = window.open(mypage, myname, winprops)
	if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}