var popupWin = null;

function windowOpener(url, name, args) 
{
    if (name == null)
        name = "detail";
    if (args == null)
        args = "height=600,width=790,resizable=true,scrollbars=yes,menubar=false";
        
    if (popupWin == null)
    {
        popupWin = window.open(url,name,args);
    } 
    else 
    {
        if (!popupWin.closed)
        { 
            popupWin.location.href = url;
        } 
        else 
        {
            popupWin = window.open(url, name,args);
        }
    }
    popupWin.focus();
    
    return false;
}