function math()
{
var standard=24;
var premier=32;
var result1=0;
var result2=0;
var height=0;
var width=0;

height=document.getElementById('height').value;
width=document.getElementById('width').value;
premier=document.getElementById('paper1').value;
standard=document.getElementById('paper2').value;

if (height>0 & width>0 ) {
result1=(height*width*standard/1000000).toFixed(2);
result2=(height*width*premier/1000000).toFixed(2);
result3=(height*width/1000000).toFixed(1);
var pound='\xa3';
document.getElementById('standard_paper').value=(pound + result1);
document.getElementById('premier_paper').value=( pound +result2);
if (result3<=1) {document.getElementById('wall_size').value=result3+' '+'square meter';}
else document.getElementById('wall_size').value=result3+' '+'square meters';


}}

function canvas_price(obj,dest) {
	var pound='\xa3';
	var val=obj.value;
	document.getElementById(dest).value=(pound + (val*1).toFixed(2));				
	}