var xmlhttp;

function showSelection(str)
{
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
  alert ("Browser does not support HTTP Request");
  return;
  }
var url="getCoatings.php";
url=url+"?coatingType="+str;
url=url+"&sid="+Math.random();
xmlhttp.onreadystatechange=stateChanged;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);
}

function showCurrencySelection(str)
{
document.getElementById("currencyLabel").innerHTML=str;

if(str=="USD"){
	document.getElementById("currencySymbol").innerHTML="$";
}else{
	document.getElementById("currencySymbol").innerHTML="";
}
}

function showUnitSelection()
{
chosen = ""
len = document.form.units.length

for (i = 0; i <len; i++) {
if (document.form.units[i].checked) {
chosen = document.form.units[i].value
}
}
if(chosen=="u.s."){
document.getElementById("unitLabel").innerHTML="ton";
}else{
document.getElementById("unitLabel").innerHTML="tonne";
}
}

function showCoats(str)
{
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
  alert ("Browser does not support HTTP Request");
  return;
  }
var url="getCoatings.php";
url=url+"?coatingSystem="+str;
url=url+"&sid="+Math.random();
xmlhttp.onreadystatechange=stateChangedCoats;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);
}

function stateChanged()
{
if (xmlhttp.readyState==4)
{
document.getElementById("specificCoatings").innerHTML=xmlhttp.responseText;
}
}

function stateChangedCoats()
{
if (xmlhttp.readyState==4)
{
document.getElementById("applications").innerHTML=xmlhttp.responseText;
}
}

function stateChangedCurrency(newCurrency, unit)
{
if (xmlhttp.readyState==4)
{
document.getElementById("currencyLabel").innerHTML="("+newCurrency+"/"+unit+")";
}
}

function GetXmlHttpObject()
{
if (window.XMLHttpRequest)
  {
  // code for IE7+, Firefox, Chrome, Opera, Safari
  return new XMLHttpRequest();
  }
if (window.ActiveXObject)
  {
  // code for IE6, IE5
  return new ActiveXObject("Microsoft.XMLHTTP");
  }
return null;
}