var xmlHttp, divID;
var imageURL, prev_id, prev_img;
var obj;

function changeImage(id, img_on, img_off) {
     if (prev_id!=undefined){
		 if (prev_id=="mcmahon"){
			 if (id=="mcmahon") {
				document.getElementById(prev_id).src = prev_img;
			 }
			 else {
				 //var obj = document.getElementById('pub');
				 if (obj._expand == true) slide('pub');
			 }
		 }
		 else {
			document.getElementById('head').src = 'include_head.asp?img=pubs'; 
		 }
		 document.getElementById(prev_id).src = prev_img;
	 }
	 else {
		 if (id=="mcmahon") document.getElementById('head').src = 'include_head.asp?img=pubs';
	 }
	 
	 imageURL = "http://www.mcmahonmed.com/" + img_off;
	 
     if (obj != null) {
		 if (obj._expand == false) {
		 document.getElementById(id).src = img_on;
		 }
	 }

	 prev_id = id;
	 prev_img = img_off;
}

function getMain(page) {
	var url;
	if (page=="index") {
		url = "include_main.asp";
	}
	else if (page=="mcmahon") {
		url = "include_newspaper.asp";
	}
	divID = "idMain";
	xmlHttp=GetXmlHttpObject(stateChanged)
	xmlHttp.open("GET", url , true)
	xmlHttp.send(null)	
}

// left nav var functions
function slide(Id, interval, to) {
obj = document.getElementById(Id);
var H, step = 10;

if (obj == null) return;
if (to == undefined) { // user clicking
if (obj._slideStart == true) return;
if (obj._expand == true) {
to = 0;
obj.style.overflow = "hidden";
} else {
//show main section
//getMain(Id);
slide.addId(Id);
for(var i=0; i < slide.objects.length; i++) {
if (slide.objects[i].id != Id && slide.objects[i]._expand == true) {
slide(slide.objects[i].id);
}
}

obj.style.height = "";
obj.style.overflow = "";
obj.style.display = "block";
to = obj.offsetHeight; 
obj.style.overflow = "hidden";
obj.style.height = "1px";
}
obj._slideStart = true;
}

step = ((to > 0) ? 1:-1) * step;
interval = ((interval==undefined)?1:interval);

obj.style.height = (H=((H=(isNaN(H=parseInt(obj.style.height))?0:H))+step<0)?0:H+step)+"px";


if (H <= 0) {
obj.style.display = "none";
obj.style.overflow = "hidden";
obj._expand = false;
obj._slideStart = false;
//show index page
//getMain('index');
} else if (to > 0 && H >= to) {
obj.style.display = "block";
obj.style.overflow = "visible";
obj.style.height = H + "px";
obj._expand = true;
obj._slideStart = false;
} else {
setTimeout("slide('"+Id+"' , "+interval+", "+to+");", interval);
}
}
slide.objects = new Array();
slide.addId = function(Id)
{
for (var i=0; i < slide.objects.length; i++) {
if (slide.objects[i].id == Id) return true;
}
slide.objects[slide.objects.length] = document.getElementById(Id);
}

// rollover image functions
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) {if(imageURL!=x.oSrc) x.src=x.oSrc;}
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{ 
document.getElementById(divID).innerHTML=xmlHttp.responseText 
} 
} 

function GetXmlHttpObject(handler)
{ 
var objXmlHttp=null

if (navigator.userAgent.indexOf("Opera")>=0)
{
alert("This example doesn't work in Opera") 
return 
}
if (navigator.userAgent.indexOf("MSIE")>=0)
{ 
var strName="Msxml2.XMLHTTP"
if (navigator.appVersion.indexOf("MSIE 5.5")>=0)
{
strName="Microsoft.XMLHTTP"
} 
try
{ 
objXmlHttp=new ActiveXObject(strName)
objXmlHttp.onreadystatechange=handler 
return objXmlHttp
} 
catch(e)
{ 
alert("Error. Scripting for ActiveX might be disabled") 
return 
} 
} 
if (navigator.userAgent.indexOf("Mozilla")>=0)
{
objXmlHttp=new XMLHttpRequest()
objXmlHttp.onload=handler
objXmlHttp.onerror=handler 
return objXmlHttp
}
}