function openpopup(URL,wwid,wheigh) 
{
  var op_wid  = wwid;   
  var op_heigh = wheigh; 
  var option = "toolbar=no,scrollbars=yes,location=no,directories=no,menubar=no,resizable=yes,status=no,width="+op_wid+",height="+wheigh;		
  window.open(URL, '',option); 
}

function CalculProduit(nom, pu)
{
	var form = document.form_tarifs;
	var	total;
	
	if (form.elements[nom].value == "" || !parseInt(form.elements[nom].value))
		form.elements[nom].value = 0;
	if (form.elements[nom].value < 0) form.elements[nom].value = 0;
	form.elements[nom].value = Math.floor(form.elements[nom].value);
	
	total = pu * form.elements[nom].value;
	form.elements[nom + "_tot"].value = total;
	
	CalculTotal();
}

function CalculService(nom, pu)
{
	var form = document.form_tarifs;
	if (form.elements[nom].checked == true)
	{
		form.elements[nom + "_tot"].value = pu;
	}
	else
	{
		form.elements[nom + "_tot"].value = 0;	
	}
	
	CalculTotal();
}

function CalculTotal()
{
	var form = document.form_tarifs;
	var i;
	var total = 0;
	
	for (i=0; i < form.elements.length; i++)
	{
		if ((form.elements[i].name.substr(0, 5) == "prod_") || (form.elements[i].name.substr(0, 5) == "serv_"))
		{
			if (form.elements[i].name.indexOf("_tot", 5) != -1)
			{
				total += parseInt(form.elements[i].value);
			}
		}
	}
	
	form.elements["total"].value = total;
}