function productsNavigation(courseId)
{
	var xmlHttp;
	try
	{
		// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
	}
	catch (e)
	{  // Internet Explorer
		try
		{
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
			try
			{
				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e)
			{
				alert("Your browser does not support AJAX!");
				return false;
			}
		}
	}

	xmlHttp.onreadystatechange=function()
	{
		if(xmlHttp.readyState==4)
		{
			// Get the data from the server's response
			var responseText = xmlHttp.responseText;
			document.getElementById("scroll_div").innerHTML = responseText;
			setCourseTypeId(courseId);
			//alert(responseText);
		}
	}

	var path = "courses.php?course=" + courseId;
	xmlHttp.open("GET", path , true);
	xmlHttp.send(null);
}


function calendarNavigation(month, year)
{
	var xmlHttp;
	try
	{
		// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
	}
	catch (e)
	{  // Internet Explorer
		try
		{
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
			try
			{
				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e)
			{
				alert("Your browser does not support AJAX!");
				return false;
			}
		}
	}

	xmlHttp.onreadystatechange=function()
	{
		if(xmlHttp.readyState==4)
		{
			// Get the data from the server's response
			document.getElementById("calendarFrame").innerHTML = xmlHttp.responseText;
		}
	}

	var path = "calendarLayout.php?m=" + month+ "&y=" +year;
	xmlHttp.open("GET", path , true);
	xmlHttp.send(null);
}