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Been coding in PHP for years, using and working with Javascript but not writing it from scratch at all. Trying to get a handle on how to Ajax and javascript for a project this week. Have a question.

 

This works fine, tested it on my host, it's from w3schools:

<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function showCustomer(str)
{
var xmlhttp;    
if (str=="")
  {
  document.getElementById("txtHint").innerHTML="";
  return;
  }
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
    document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
    }
  }
xmlhttp.open("GET","ajaxtestpost.php?vv="+str,true);
xmlhttp.send();
}
</script>
</head>
<body>

<form action=""> 
<select name="customers" onchange="showCustomer(this.value)">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
</form>
<br />
<div id="txtHint">Customer info will be listed here...</div>

</body>
</html>

 

 

 

Question is this:

How do I add to the form this:

<input type="hidden" name="foodid" id="foodid" value="5">

 

and have it end up populating the info here, so that my ajaxtestpost.php page can use it?:

xmlhttp.open("GET","ajaxtestpost.php?foodid="+str2"&&vv="+str,true);

 

The things I have tried did not work, I am a little lost...

 

Thanks much!!!

 

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https://forums.phpfreaks.com/topic/264812-new-to-ajax-question/
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