function EmptyField(textobject)
{
	textobject.value = "";
}

function auMoinsUneNewsletter(source, arguments)
{
    arguments.IsValid = false;
    var form = document.forms["Home"];
	for(i=0;i<form.length;i++)
	{
 	  if (form.elements[i].name.substring(0,4) == 'chk_' && form.elements[i].checked)
	  {
		arguments.IsValid = true;
		break;
	  }
	}
}