getting xmlhttp.status 404

[surreal5335]

I am trying to get a connection to my php file and currently I keep getting a 404 error.

function loadXMLDoc(id)
{
var xmlhttp;
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()
  {
      alert('xmlhttp.readyState: '+xmlhttp.readyState+' xmlhttp.status: '+xmlhttp.status);
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
    document.getElementById("left_column").innerHTML=xmlhttp.responseText;
    }
  }
xmlhttp.open("GET","get_ajax.php?postid="+id,true);
xmlhttp.send();
}

I have the get_ajax.php file in the same directory as my js file that is handling my ajax call

What am I missing here?

Thanks alot

[patryk]

404 means there's no such document.
maybe wrong addres?

[surreal5335]

thanks for the reply,

I know what 404 means, just trying to understand why the file is not being found. I guess I could hard code the entire url to the php file to see if it finds it then

[Dormilich]

is the HTML page in the same directory as its JS file?