// Common JavaScript Functions
// Last Update: 3/15/07 - mcc36
// ----------------------------

// THE FOLLOWING CODE WILL EXECUTE ON PAGE LOAD:


// ------------------------------------------------
// ************************************************
// ------------------------------------------------


// THE FOLLOWING ARE FUNCTIONS THAT MUST BE CALLED
//   IN ORDER TO BE EXECUTED:

var xmlHttp;
var parent;

function getCategory(str, tier)
{ 
//alert("Got " + str + " and " + tier);  //-- for debugging
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request")
 return
 }
 
var url="./includes/get_category.php"
url=url+"?q="+str;
url=url+"&tier="+tier;
if(tier > 1)
{
	parent = document.getElementById("placeholder" + (tier - 2)).value; // such a magic number
	//alert(str + ":\n" + document.getElementById("placeholder" + (tier - 2)).innerHTML);
	url=url+"&parent="+parent;
}

url=url+"&sid="+Math.random()
xmlHttp.onreadystatechange=stateChanged 
xmlHttp.open("GET",url,true)
xmlHttp.send(null)

placeholder = "placeholder" + tier;

if(tier < 3)
	{
		t_levels = tier;
		for(t_levels; t_levels <= 3; t_levels++)
			{
				document.getElementById("placeholder" + t_levels).innerHTML = "";
			}	
	
	}

}

function getTags(str)
{
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null)
	 {
	 alert ("Browser does not support HTTP Request")
	 return
	 }
	 
	var url="./includes/get_tags.php"
	url=url+"?q="+str;
	url=url+"&sid="+Math.random()
	xmlHttp.onreadystatechange=stateChanged 
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
	
	placeholder = "placeholder";

}

function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 document.getElementById(placeholder).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;
}