var d = document;
	
	isMac = (navigator.appVersion.indexOf("Mac")!=-1) ? true : false;
	NS4 = (document.layers) ? true : false;
	IEmac = ((document.all)&&(isMac)) ? true : false;
	IE4plus = (document.all) ? true : false;
	IE4 = ((document.all)&&(navigator.appVersion.indexOf("MSIE 4.")!=-1)) ? true : false;
	IE5 = ((document.all)&&(navigator.appVersion.indexOf("MSIE 5.")!=-1)) ? true : false;
	ver4 = (NS4 || IE4plus) ? true : false;
	NS6 = (!document.layers) && (navigator.userAgent.indexOf('Netscape')!=-1) ? true:false;
	
	// Body onload utility (supports multiple onload functions)
	var gSafeOnload = new Array();
	function SafeAddOnload(f)
	{
		if (IEmac && IE4)  // IE 4.5 blows out on testing window.onload
		{
			window.onload = SafeOnload;
			gSafeOnload[gSafeOnload.length] = f;
		}
		else if (window.onload)
		{
			if (window.onload != SafeOnload)
			{
				gSafeOnload[0] = window.onload;
				window.onload = SafeOnload;
			}		
			gSafeOnload[gSafeOnload.length] = f;
		}
		else
			window.onload = f;
	}

	function SafeOnload()
	{
		for (var i=0;i<gSafeOnload.length;i++)
			gSafeOnload[i]();
	}
	
	function updateTotal()
	{
		// Return if the browser is old
		if (!d.getElementById) return;
		
		var not = d.getElementById('not');
		var not_val = not.options[not.selectedIndex].value;
		var tot = d.getElementById('tot');
		var tot_val = tot.options[tot.selectedIndex].getAttribute('overload');
		var total = d.getElementById('total');
		
		if (not_val && tot_val) {
			total.innerHTML = '' + (not_val * tot_val) + ' €';
		}
		else {
			total.innerHTML = '0';
		}
	}
	
	function printPage() {
		if (window.print) {
			window.print();
		}
	}