function PopWin(url,h,w)
{
    var ww = 480, wh = 340, leftPos = null, topPos = null; 

    IE=(document.all)?true:false; 
    var wh = (IE)?document.body.clientHeight : window.innerHeight; 
    var ww = (IE)?document.body.clientWidth : window.innerWidth; 

    if (top.screen)
    { 
        if (screen.width)
        { 
            leftPos = Math.round((ww-w-10)/2); 
            topPos = Math.round((wh-h-29)/2); 
        }
        else
        { 
            leftPos = 50 
            topPos = 50 
        } 
    } 
    
    popupWin = window.open(url, 'popup', 'resizable,height=' + h + ',width=' + w + ',top=' + topPos + ',left=' + leftPos + '') 
}