function JSpageCalc(totalPages) {
	// Default state
	multiplier = 1;
	
	// Set multipler inversely proportional to amount
	if (totalPages > 999) multiplier = 0.06;
	if (totalPages > 4999) multiplier = 0.048;
	if (totalPages > 9999) multiplier = 0.038;
	if (totalPages > 19999) multiplier = 0.030;
	if (totalPages > 49999) multiplier = 0.028;
	if (totalPages > 79999) multiplier = 0.027;
	if (totalPages > 99999) multiplier = 0.025;
	if (totalPages > 199999) multiplier = 0.024;
		
	// Calculate estimate, round to 0 decimal points
	estimate = (totalPages * multiplier).toFixed(0);
	return estimate;
}

function JScalculator() {
	form = document.forms["calculator"];
	totalPages = parseFloat(form.pages.value);
	
	// Validate field - Must be a real number
	if (isNaN(totalPages)) {
		form.pages.focus();
		return;
	} else {
		estimate = JSpageCalc(totalPages);
	}
	
	var h = document.getElementById("QuoteBox");
	h.style.display="";
	h.innerHTML = "<h2> The estimated cost is &pound;" + estimate + " to scan " + totalPages + " pages </h2><br /><a href=" + window.location.href + ">Click here to calculate again</a><br /><br />";
}