function popnot(url)
{
  window.open(url,"","toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=0,width=630,height=470");
}

function popavi(url)
{
  window.open(url,"","toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=0,width=450,height=500");
}

function poppru(url)
{
  window.open(url,"","toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=0,width=750,height=500");
}

function poprev(url)
{
  window.open(url,"","toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=0,width=1024,height=720");
}