// JavaScript Document 
var xmlHttp;

function changeContent(str)
{ 
//alert("function called");
var content = document.getElementById('content');

xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url="content/"+ str +".php";

xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function stateChanged() 
{ 
if (xmlHttp.readyState==4)
{ 
document.getElementById("content").innerHTML =xmlHttp.responseText;

}
}

function GetXmlHttpObject()
{
var xmlHttp=null;
try
  {
  // Firefox, Opera 8.0+, Safari
  xmlHttp=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
return xmlHttp;
}
//----------------------------------

function setBackground(id) {

document.getElementById("background").src ="images/background_" + id +".jpg";

}


//the code below sets the current tab
function makeCurrentNav(id) {
var i = 0;
var list = document.getElementById("navigation_table");
var arr = list.getElementsByTagName("td");
//alert(arr.length);

for (i=0; i<arr.length; i++){
	arr[i].style.color='#ffffff';
	//alert(arr[i].className);
	}

document.getElementById(id).style.color ="#ffcc00";
}

//----------------------------------

function setPanarama(increment){
var date = new Date();
var src = (date.getDate() + increment);

if (src > 18 ){
	src = (src -18);
	}
//alert(src);
document.getElementById("panorama").src="images/panorama/panorama_x800/" + src + ".jpg";
}