function refresh_srn(type)
{
	var req = false;
	
	if (window.XMLHttpRequest)
	{
		// Mozilla, Safari, ...
        req = new XMLHttpRequest();
        if (req.overrideMimeType) {
            req.overrideMimeType('text/xml');
        }
    }
    else if (window.ActiveXObject)
    {
    	// IE
        try {
            req = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            try {
                req = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
        }
    }

	if (!req)
	{
		// was tun?
		return false;
	}
	
	if (type == 'service')
	{
		var myindex=document.forms['form_srn'].elements['service'].selectedIndex;
		if (document.forms['form_srn'].elements['service'].options[myindex].value != '')
		{
			srn_id = (document.forms['form_srn'].elements['service'].options[myindex].value);
		}
	}
	else if (type == 'product')
	{
		var myindex=document.forms['form_srn'].elements['varianten'].selectedIndex;
		if (document.forms['form_srn'].elements['varianten'].options[myindex].value != '')
		{
			srn_id = (document.forms['form_srn'].elements['varianten'].options[myindex].value);
		}
	}
        
	url = "/produkte/get_homepage_links.php?id="+srn_id;
	
	req.open("GET", url, true);
	req.send(null);
	
	req.onreadystatechange = function ()
	{
		try
		{
			if (req.readyState == 4)
			{
				if(req.status == 200)
				{
					new_html = req.responseText;
					//alert(new_html);
					if (type == 'service')
					{
						document.getElementById('pulldown_srn').innerHTML = new_html;
					}
					else if (type == 'product')
					{
						document.getElementById('links_srn').innerHTML = new_html;
					} 
				}
				else
				{
					new_html = req.responseText;
					if (type == 'service')
					{
						document.getElementById('pulldown_srn').innerHTML = new_html;
					}
					else if (type == 'product')
					{
						document.getElementById('links_srn').innerHTML = new_html;
					}
				}
			}
		}
		catch (e)
		{
			document.getElementById('pulldown_srn').innerHTML = 'error';
			return false;
		}
	}
	
	return true;
}