function mtm_accessories_length(length,price_id,width_id,price) {
	var width;
	var value;	
	width=document.getElementById(width_id).value;
	value=price*width*length;
	value=value.toFixed(2);
	if (value<16.45) value=16.45;
	document.getElementById(price_id).innerHTML='&pound;'+value;
	
}

function mtm_accessories_width(width,price_id,length_id,price) {
	var length;
	var value;	
	length=document.getElementById(length_id).value;
	value=price*width*length;
	value=value.toFixed(2);
	if (value<16.45) value=16.45;
	document.getElementById(price_id).innerHTML='&pound;'+value;
	
}