Questions about my first AJAX script.

[menyo]

hey guys!

I finally have a working ajax script, it's from a tutorial and i have altered it to my liking.I have some questions regarding it. Here's the code.

<script type="text/javascript"> 
//scanner AJAX
function Ajax()
{
	var scanner;
 	try
	{
		scanner=new XMLHttpRequest();// Firefox, Opera 8.0+, Safari 
	} 
	catch (e)
	{ 
		try
		{
			scanner=new ActiveXObject("Msxml2.XMLHTTP"); // Internet Explorer 
		}
		catch (e)
		{
			try
			{
				scanner=new ActiveXObject("Microsoft.XMLHTTP"); 
			} 
			catch (e)
			{
				alert("Your browser has no ajax support!"); return false; 
			} 
		} 
	} 
	scanner.onreadystatechange=function()
	{ 
		if(scanner.readyState==4)
		{
			document.getElementById('scanner').innerHTML=scanner.responseText;
			setTimeout('Ajax()',2000); 
		} 
	} 
	scanner.open("GET","navscanner.php",true); 
	scanner.send(null); 
}
window.onload=function()
{ 
setTimeout('Ajax()',2000); 
} 
</script>

So this outputs a table inside a div in my page that i generate with navscanner.php

Now i have a lot more div's to be filled like this. And i'm kinda stuck to where to put the new code.

1) Do i need to make the browser check each time i do a ajax request?

2)If i need more divs to refresh each 2 second like above code can i use the above code to make that happen or do i need a totally new function?

3)same question as 3 but for div's that need to get loaded on start and when a player clicks something. Can i put all this code inside the Ajax function or do i need sepperate functions for each?