function hidebutton(btn,frm)
{
document.getElementById(btn).disabled = true;
document.getElementById(btn).value = '..Please wait...';
document.getElementById(frm).submit();
}
function sure(url)
{
if(confirm('ARE YOU SURE?'))
{
window.location = url;
}
}

function toggle(what)
{
var status = document.getElementById(what).style.display;
if(status == 'none')
{
document.getElementById(what).style.display = 'block';
}
else
{
document.getElementById(what).style.display = 'none';
}
}

 function display_fields(opt, sid) {
    if (opt == 0) {
      document.getElementById(sid).style.display = "none";
    }
    else {
      document.getElementById(sid).style.display = "block";
    }
  }