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 stateChanged_content() 
{ 
	if (xmlHttp.readyState==4)
	{ 
	document.getElementById("display_content").innerHTML=xmlHttp.responseText;
	}
}

function show_content(mid,pid)
{
	xmlHttp=GetXmlHttpObject()
	//alert( "Hello"+mid);
	//alert ("Hello");
	if (xmlHttp==null)
	{
	  alert ("Your browser does not support AJAX!");
	  return;
	} 

	var url="content.php";
	url=url+"?mid="+mid+"&pid="+pid;
	
	
	xmlHttp.onreadystatechange=stateChanged_content;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}


function show_sub_menu(pid)
{
	xmlHttp=GetXmlHttpObject()
	//alert( "Hello"+vid);
	//alert ("Hello");
	if (xmlHttp==null)
	{
	  alert ("Your browser does not support AJAX!");
	  return;
	} 

	var url="sub_menu.php";
	url=url+"?pid="+pid;
	
	//show_parent_data(pid);
	
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}

function stateChanged() 
{ 
	if (xmlHttp.readyState==4)
	{ 
	document.getElementById("show_ajax_sub_menu").innerHTML=xmlHttp.responseText;
	//show_content(pid);
	}
}

function show_parent_data(pid)
{
	xmlHttp=GetXmlHttpObject()
	alert( "Hello"+pid);
	//alert ("Hello");
	if (xmlHttp==null)
	{
	  alert ("Your browser does not support AJAX!");
	  return;
	} 

	var url="content.php";
	url=url+"?mid="+pid;
	
	
	xmlHttp.onreadystatechange=stateChanged_content;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}

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

/* ============================================================================================== */

function show_content_of_submenu(mid,pid)
{
	xmlHttp=GetXmlHttpObject()
	//alert( "Hello"+mid);
	//alert ("Hello");
	if (xmlHttp==null)
	{
	  alert ("Your browser does not support AJAX!");
	  return;
	} 

	var url="sub_menu.php";
	url=url+"?mid="+mid+"&pid="+pid;
	
	
	//xmlHttp.onreadystatechange=stateChanged_content_of_submenu;
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}

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