var xmlhttp
var selection

function loadXMLDoc(selection1)
{
	document.getElementById("our_service").style.display = 'none';
	
	selection = selection1;
	xmlhttp=null
	if (window.XMLHttpRequest)
	{
		xmlhttp=new XMLHttpRequest()
	}
	else if (window.ActiveXObject)
	{
		xmlhttp=new ActiveXObject("Microsoft.XMLHTTP")
	}
	
	if (xmlhttp!=null)
	{
		if(selection == 2)
		{
			url = "digi_sign.xml";
		}
		else if(selection == 3)
		{
			url = "comp_network.xml";
		}
		else if(selection == 4)
		{
			url = "trp.xml";
		}
		else if(selection == 5)
		{
			url = "cctv.xml";
		}
		else
		{
			url = "web_tech.xml";
			selection = 1;
		}
		
		xmlhttp.onreadystatechange = state_Change
		xmlhttp.open("GET", "/lib/xml/" + url, true)
		xmlhttp.send(null)
	}
	else
	{
		alert("Your browser does not support XMLHTTP.")
	}
}

function state_Change()
{
	if (xmlhttp.readyState==4)
	{
		if (xmlhttp.status==200)
		{
			document.getElementById('our_service').innerHTML=xmlhttp.responseText
			Effect.SlideDown('our_service');
		}
		else
		{
			alert("Problem retrieving XML data:" + xmlhttp.statusText)
		}
	}
}