function rekenuit ()
{
	var vms = document.getElementById('omreken').value;
	var vms = vms.replace(',', '.');
	var vms = parseFloat(vms);
	var ret = vms * 3.6
	var ret = Math.round(ret * 100) / 100;
	
	if ( isNaN(ret) ) {
		ret = 0;
	}
	
	document.getElementById('omgerekend').value = ret;
}

function calculateTotal()
{
	for(i = 0; i < document.forms[0].ondergrond.length; i++)
	{
		if(document.forms[0].ondergrond[i].checked)
		{
			var ondergrond = document.forms[0].ondergrond[i].value;
			break;
		}
	
	}
	
	for(i = 0; i < document.forms[0].btw.length; i++)
	{
		if(document.forms[0].btw[i].checked)
		{
			var btw = document.forms[0].btw[i].value;
			break;
		}
	
	}
	
	var totalCosts = 0;
	
	switch(ondergrond)
	{
		case 'pleister':
		case 'schuur':
		case 'spack_behoud':
		case 'scan':
		case 'gips':
			ondergrondCosts = 2.5;
			break;
		case 'spack':
			ondergrondCosts = 3.8;
			break;
		default:
			return false;
			break;
	}
	
	totalCosts += ondergrondCosts;
	
	
	if(document.getElementById('afplakken').checked == false)
	{
		totalCosts += 2.5;
	}
	
	if(document.getElementById('machinaal_schuren').checked == true)
	{
		totalCosts += 0.5;
	}
	
	if(document.getElementById('schade').checked == true)
	{
		totalCosts += 8.5;
	}
	
	var kleuren = parseInt(document.getElementById('kleuren').value);
	if(kleuren < 1)
	{
		return false;
	}
	
	totalCosts += kleuren;
	totalCosts -= 1;
		
	var opp = document.getElementById('oppervlakte').value;
	var opp = opp.replace(',', '.');
	var opp = parseFloat(opp);	
	
	totalCosts = opp * totalCosts;
	
	var vat = (totalCosts / 100 ) * btw;

	totalCosts += vat;
	
	if ( !isNaN(totalCosts) &&  opp > 0 && kleuren > 0 && btw > 0) 
	{
		document.getElementById('calculated').style.display = 'block'; 
		document.getElementById('calculated').innerHTML = 'Kostenberekening: &euro; ' + Math.round(totalCosts);
	}
	else
	{
		document.getElementById('calculated').style.display = 'none'; 
		document.getElementById('calculated').innerHTML = '';
	}
	
	
}