var popWin = null 
var winCount = 0
var winName = "popWin"

function open_win(page,w,h,scrl)
        {
        winName = "popWin" + winCount++
        closePopWin()
        $options="status=no,resizable=no,scrollbars="+scrl+",menubar=no,toolbar=no,location=no,width="+w+",height="+h;
        popWin = window.open(page,"popWin" + winCount++,$options);
        }

function closePopWin()
        {
        if (navigator.appName != "Microsoft Internet Explorer" || parseInt(navigator.appVersion) >=4) //do not close if early IE
        if(popWin != null) if(!popWin.closed) popWin.close() 
        }