<!-- 
function verif_champs()
{
	if((window.document.forms['step1'].elements[0].checked == false)&&(window.document.forms['step1'].elements[1].checked == false)&& 
	   (window.document.forms['step1'].elements[2].checked == false)&&(window.document.forms['step1'].elements[3].checked == false)&&
	   (window.document.forms['step1'].elements[4].checked == false)&&(window.document.forms['step1'].elements[5].checked == false)&&
	   (window.document.forms['step1'].elements[6].checked == false)&&(window.document.forms['step1'].elements[7].checked == false)&&
	   (window.document.forms['step1'].elements[8].checked == false)&&(window.document.forms['step1'].elements[9].checked == false)&&
	   (window.document.forms['step1'].elements[10].checked == false)&&(window.document.forms['step1'].elements[11].checked == false)&&
	   (window.document.forms['step1'].elements[12].checked == false)&&(window.document.forms['step1'].elements[13].checked == false)&&
	   (window.document.forms['step1'].elements[14].checked == false)&&(window.document.forms['step1'].elements[15].checked == false)&&
	   (window.document.forms['step1'].elements[16].checked == false)&&(window.document.forms['step1'].elements[17].checked == false)&&
	   (window.document.forms['step1'].elements[18].checked == false))
	{
		alert("Please choose a pattern for your chain.");
		window.document.forms['step1'].elements[0].focus();
		return false;
	}	

}

-->