var ima ='';

if (marchand_id.length==12 && extart_id.length < 150 && price.length < 150){

	if (order_id !='' && step!=''){
		ima ="http://www.cadeaux-avenue.com/tracking/reckdoachat.jsp?step="+step+"&marchand_id="+marchand_id+"&extart_id="+extart_id+"&price="+price+"&order_id="+order_id;
	}else{
		ima ="http://www.cadeaux-avenue.com/tracking/reckdo.jsp?&marchand_id="+marchand_id+"&extart_id="+extart_id+"&price="+price;
	}
	
	var nbs_t= " border='0' height='1' width='1' alt=''>";
	document.write('<IMG SRC='+ima+nbs_t);
	
}