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Rengaraj

Rengaraj

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Onchange event in php with ajax

Jan 5 2013 9:22 PM

code:<html>
<head>
<script>
function showUser(str)
{
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").outerHTML=xmlhttp.responseText;
    }
  }
xmlhttp.open("GET","getuser.php?id="+str,true);
xmlhttp.send();
}
</script>
</head>
<body>

<form>
<select name="id" onChange="showUser(this.value)">
<option value="">Select a person:</option>
<option value="1">1</option>
</select>
</form>
<br>
</body>
<div id="txtHint"><b></b></div>
</html>
<?php
if(isset($_GET['id']))
{
echo "this is id". $_GET['id'];
}

?>
Question:
The result is create with another one listbox. how to avoid that?

Answers (1)