//  Filename: calc_van.js  //  Function: calculates van benefit based on age and usage  //  Author: Barry Hood -- design@delinear.co.uk  //  Date: 2005.05.06
function van_calculator(form_name)
{
	var van_private_use=document.getElementById(form_name).van_private_use.value;
	var van_aged_4=document.getElementById(form_name).van_aged_4.value;
	var van_benefit=0;
	
	if(van_private_use=="no")
	{
		van_benefit="0";
	}else
	{
		van_benefit=(van_aged_4=="yes"?"350":"500");
		
	}
	document.getElementById(form_name).van_benefit.value= format_number_output(van_benefit,'0',',','£');
	return false;
}