AJAX basierter Chat läuft nur im Firefox

 

<script type="text/javascript">  
 
	if (window.XMLHttpRequest) 
	{
		xmlObject = new XMLHttpRequest(); // Mozilla, Safari, Opera
	} 
	else if (window.ActiveXObject) 
	{
		try 
		{
			xmlObject = new ActiveXObject('Msxml2.XMLHTTP'); // IE 5  
		} 
		catch (e) 
		{
			try 
			{
				xmlObject = new ActiveXObject('Microsoft.XMLHTTP'); // IE 6  
			} 
			catch (e) 
			{
				//
			}
		}
	}
 
 
 
		function loadContent()
		{
			xmlObject.open('get','getdata.php');  
			xmlObject.onreadystatechange = genOutput;
			xmlObject.send(null);
		}
		
		function genOutput()
		{
			if(xmlObject.readyState == 4)
			{
				if (xmlObject.status == 200) 
				{
					document.getElementById('Content').innerHTML = xmlObject.responseText;  
				}
			}
		}		
 
		
		function sendMessage()
		{
			var username = document.chat.username.value;
			var message = document.chat.message.value;
			
			xmlObject.open('post', 'create_message.php');    
			xmlObject.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');  
			xmlObject.onreadystatechange = interpretRequest;
			xmlObject.send("username="+escape(username)+"&message="+escape(message));  
 
		}
		
		
 
		function interpretRequest() 
        {
				if (xmlObject.status != 200) 
				{
					alert("Fehler bei der Übermittlung");  
				} 
				loadContent();
        }
 
 
	setInterval('loadContent()', 1000)  
 
	</script>