// JavaScript Document
var xmlHttp

function reloadNewsItems()
	{ 
		xmlHttp=GetXmlHttpObject();
		if (xmlHttp==null)
		  {
		  alert ("Your browser does not support AJAX!");
		  return;
		  } 
		
		var url="includes/news-preferenceFunctions.php";
		
		//get the checkboxes
		checkboxes=document.forms.formPreferences.chk_categories;
		txt=""
		j=0;
		url=url+"?sid="+Math.random();
		
		for (i=0;i<checkboxes.length;++ i)
		{
				if (checkboxes[i].checked)
					{
						url=url+"&";
						url=url + "a" + i +"="+ checkboxes[i].value;				
					}
		}
		//url=url+"?q="+str;
		//url=url+"&sid="+Math.random();
		xmlHttp.onreadystatechange=stateChanged;
		xmlHttp.open("GET",url,true);
		xmlHttp.send(null);
	}
	
function saveNewsPreferences(userID)
	{ 
		xmlHttp=GetXmlHttpObject();
		if (xmlHttp==null)
		  {
		  alert ("Your browser does not support AJAX!");
		  return;
		  } 
		
		var url="includes/news-preferenceFunctions-Save.php";
		
		//get the checkboxes
		checkboxes=document.forms.formPreferences.chk_categories;
		txt=""
		j=0;
		url=url+"?sid="+Math.random();
		if (userID)
			{
			url=url+"&userID="+userID;
			}
		
		for (i=0;i<checkboxes.length;++ i)
		{
				if (checkboxes[i].checked)
					{
						url=url+"&";
						url=url + "a" + i +"="+ checkboxes[i].value;				
					}
		}
		//url=url+"?q="+str;
		//url=url+"&sid="+Math.random();
		xmlHttp.onreadystatechange=stateChangedSave;
		xmlHttp.open("GET",url,true);
		xmlHttp.send(null);
	}

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

function stateChangedSave() 
	{ 
		if (xmlHttp.readyState==4)
			{ 
				document.getElementById("save_confirmation").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;
	}