Question

Here is an example of my code:

function blah()
{
  var xmlHttp = (window.XMLHttpRequest) ? new XMLHttpRequest() : new ActiveXObject("Microsoft.XMLHTTP");

  xmlHttp.onreadystatechange = function()
  {
    if (xmlHttp.status == 200 && xmlHttp.readyState == 4)
      alert(xmlHttp.responseText);
  }

  xmlHttp.open("GET", "ajax.php?_=" + new Date().getTime(), true);
  xmlHttp.send();
}

It seems to work find in Chrome but IE8 throws an “Unsepcified Error” on the if status = 200 and readyState = 4 line.

Oddly, though, the alert does give the response from the php page.

Any ideas why this might be happening?

Answer 1

Maybe checking status if readyState != 4 causes the error in IE?

Try

if (xmlHttp.readyState == 4 && xmlHttp.status == 200)