Loading javascript into DIV

harleyhar · October 3, 2011

Hi,

I need some help on getting my javascript to display in a div after making an AJAX call.

The javascript is created and written to a file. I have tested the javascript by creating a static html page with it that shows the result that I am looking for. However when I try to populate it with AJAX the only thing that shows up is a line of text that I placed outside of the <script></script> tags.

Here is the function draw_chart that calls the php program;

<head>
<script type="text/javascript" src="http://www.google.com/jsapi"></script>

<script type="text/javascript">
google.load('visualization', '1', {packages: ['corechart']});

function getXMLHTTP() {
	var xmlhttp=false;	
	try{
		xmlhttp=new XMLHttpRequest();
	}
	catch(e)	{		
		try{			
			xmlhttp= new ActiveXObject("Microsoft.XMLHTTP");
		}
		catch(e){
			try{
			xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
			}
			catch(e1){
				xmlhttp=false;
				alert("Fail");
			}
		}
	}

	return xmlhttp;
}
function drawChart(id) { // update the visualization div with valid chart data 

var req = getXMLHTTP(); // fuction to get xmlhttp object
if (req) {
	req.onreadystatechange = function() {
		if (req.readyState == 4) { //data is retrieved from server
			if (req.status == 200) { // which reprents ok status                    
				document.getElementById('visualization').innerHTML=req.responseText;
			}
			else
			{ 
				alert("There was a problem while using XMLHTTP:\n");
			}
		}            
	}

	req.open("GET", "draw_chart.php?id="+id, true); //open url using get method
	req.send(null);
}
}
</script>

</HEAD>

Here is the draw_chart.php file. The code that is being read from the data file was tested in the Google Code Playground and works.

<?php 
// First read the chart info from the data file
if (isset($_GET['id'])) {

	$ch = curl_init("data/" . $_GET['$id']) ;
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	$contents = curl_exec ($ch);
	curl_close ($ch);

	$fp = fopen("data/".$_GET['id'], "r");

	while (!feof ($fp)) {
		$line = fgets ($fp, 4096);
		echo $line;
	}

	fclose($fp);

	echo "Script output finished";
}


?>

"Script output finished" is what ends up displayed in the div. I've tried running it with with the <script> tags removed from the input file and I can see all the code gets written.

Here is my html part;

<div id='visualization'></div>

<script type='text/javascript'>
    drawChart(7640);
</script>

Any help at all about what I might be able to try to find out what's going on will be greatly appreciated. I've run out of ideas.

Thanks!

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Loading javascript into DIV

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