function Valider()
{
if(isChecked(document.sondage.reponse)=='Empty')
	{
	alert('Vous n\'avez pas voté')
	} 
	else 
	{
	var ids = document.sondage.ids.value;
	var lgc = document.sondage.lgc.value;
	var ind = isChecked(document.sondage.reponse);
	var repc = document.sondage.reponse[ind].value;
	window.open('sondage.php?lg='+lgc+'&sond='+ids+'&rep='+repc+'','vote','height=100,width=350,left=50,top=300,resizable=no,scrollbars=auto')
	}
}


/*Checks if a radio button or Check Box has a value
selected. */
/*The return value is set to "Empty", or the index value
of the value selected.*/
function isChecked(field)
{
   for (var i=0; i< field.length; i++)
   {
      if (field[i].checked)
      { return i;
      }
   }
   return "Empty";
}