function getValue(varname)
{
  var url = window.location.href;
  var index = url.indexOf("?");  
  if (index==-1){return "";}
  var qparts = url.split("?");
  if (qparts.length == 0)
  {return "";}
  var query = qparts[1];
  var vars = query.split("&");
  var value = "";
  for (i=0;i<vars.length;i++)
  {
    var parts = vars[i].split("=");
    if (parts[0] == varname)
    {value = parts[1];
      break;}
  }
  value = unescape(value);
  value.replace(/\+/g," ");
  return value;
}