var popwin
function popWin(url,w,h,s,r) {
	if(w==null) w = 800
	if(h==null) h = 600
	if(s==null) s = 1
	if(r==null) r = 1
	popwin = window.open(url,'popwin',config='height=' + h + ',width=' + w + ',scrollbars=' + s + ',resizable=' + r)
	popwin.focus()
}