Ajax Help needed.

Millay · 24-04-2008, 11:23

Hi All I have the following script and everytime I click the submit button, I get an 'object expected' error on line 66, line 66 is the submit button line.

Can anybody help me debug this, im at the stage of staring blankley at it.

Many thanks
Andy

Code:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<script language="javascript">
function makeRequest() {

        var httpRequest;

        if (window.XMLHttpRequest) { // Mozilla, Safari, ...
            httpRequest = new XMLHttpRequest();
            if (httpRequest.overrideMimeType) {
                httpRequest.overrideMimeType('text/xml');
                // See note below about this line
            }
        } 
        else if (window.ActiveXObject) { // IE
            try {
                httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
                } 
                catch (e) {
                           try {
                                httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
                               } 
                             catch (e) {}
                          }
                                       }

        if (!httpRequest) {
            alert('Giving up :( Cannot create an XMLHTTP instance');
            return false;
        }
        httpRequest.onreadystatechange = function() { alertContents(httpRequest); };
        httpRequest.open('POST', 'test.asp', true);
		httpRequest.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
        httpRequest.send("imgfile=" + document.getElementById(‘imgfile’).value);

    }

    function alertContents(httpRequest) {

		if (httpRequest.readyState == 1) {
            var thingDisplay = document.getElementById('holiday');
			thingDisplay.innerHTML = '<b>LOADING...</b>';
            }

        if (httpRequest.readyState == 4) {
            if (httpRequest.status == 200) {
                //alert(httpRequest.responseText);
				var thingDisplay = document.getElementById('holiday');
			thingDisplay.innerHTML = httpRequest.responseText;
            } else {
				alert(httpRequest.responseText);
                //alert('There was a problem with the request.');
            }
        };
    };
</script>
</head>

<body>
<form>
  <input type="file" name="imgfile" id="imgfile">
  <INPUT TYPE="button" VALUE="Submit" onClick="makeRequest()">
</form>
<div id="holiday"></div>
</body>
</html>

**Graham M** · 24-04-2008, 11:26

try putting a semi-colon after the () in the onClick statement

onClick="makeRequest();"

I remember reading somewhere that you couldn't upload images with Ayjax per se anyway

Millay · 24-04-2008, 11:30

thanks zeph, but no still object expected.

I am aware of what you are saying about ajax and uploading files, that is no strictly what im trying to acheive.

Thanks
Andy

punky · 24-04-2008, 11:32

Try changing:

document.getElementById(‘imgfile’).value

to

document.getElementById('imgfile').value

in case its that. If neither that or Zeph's idea works, then try putting alert statements in various places throughout the script to see at what point the script is failing.

Millay · 24-04-2008, 11:35

Thats cracked it thanks gavin

**Graham M** · 24-04-2008, 11:47

Nicely done

**Paul M** · 24-04-2008, 12:13

Quote:

Originally Posted by Gavin

Try changing:

document.getElementById(‘imgfile’).value

to

document.getElementById('imgfile').value

Am I going blind here, whats the difference between these two lines

Mr_love_monkey · 24-04-2008, 12:15

Quote:

Originally Posted by Paul M

Am I going blind here, whats the difference between these two lines

The types of quotes

**Jefferson T** · 24-04-2008, 12:17

the quotation marks are different

---------- Post added at 12:17 ---------- Previous post was at 12:16 ----------

and it was only 'cos i really am going blind i noticed lol

(My screen reader read both lines differently)

**Graham M** · 24-04-2008, 12:57

btw

danielf · 24-04-2008, 14:35

Quote:

Originally Posted by Zeph

btw

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