function openWindow(page,name,width,height,modal)
{
    var params= '';
    if(height>0){
        params += ',height=' + height;
    }
    if(width>0){
        params += ',width=' + width;
    }
    params += ',toolbar=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no';
    if (modal) {
        params += ',modal=yes';
    }    
    if (params.charAt(0) == ',') {
        params = params.substring(1, params.length);
    }
    window.open(page,name,params);
}