function changeBg(mm)
{

    if(document.getElementById(mm.id).className=="menubg")
    {
    document.getElementById(mm.id).className="menubg2";
    }
    else
    {
    document.getElementById(mm.id).className="menubg";
    }
    
}

function chkPicSize(pic)
{
   var gpic=document.getElementById(pic.id);
  
    if(gpic.width>650)
    {
        gpic.style.width=650;
    }
}