function m_openPopUp(url,x,y, menubar)
{
    if (!x && !y)
    {
        pop = window.open(""+url,"pop","toolbar=0,location=0,directories=0,status=0,menubar=1,scrollbars=1,resizable=1,width=650,height=600,left=50,top=50");
    }
    else
    {
        if (!menubar)
        {
            pop = window.open(""+url,"pop","toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,width="+x+",height="+y+",left=50,top=50");
        }
        else
        {
            pop = window.open(""+url,"pop","toolbar=0,location=0,directories=0,status=0,menubar="+menubar+",scrollbars=1,resizable=0,width="+x+",height="+y+",left=50,top=50");
        }
    }
    pop.focus();
    return false;
}