// JavaScript Document

function calculatePacks(sqm){
	var width = document.getElementById("wallwidth").value;
	var height = document.getElementById("wallheight").value;
	var result = (width*height);
	var total = (result*sqm);
	var numofpacks = result;
	document.getElementById("calcresult").value=numofpacks;
	document.getElementById("qty").value=numofpacks;	
}