var xmlHttp

// send the request for a specific letter from the alphabet
function showAlpha(ltr)
{ 
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null)
 	{
 		alert ("Browser does not support HTTP Request")
 		return
 	} 
	
 	var url="get_glossary.php"
	url=url+"?a="+ltr
	url=url+"&sid="+Math.random()
	xmlHttp.onreadystatechange=stateChanged 
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
	
	document.getElementById('ingredient').selectedIndex=0
	
	var links = document.getElementsByName('alpha')
	for(var i=0;i<links.length;i++)
	{
		links[i].className='nav_alphabet'
	}

	document.getElementById(""+ltr+"").className='nav_alphabet_on'
	document.getElementById('printArea').innerHTML='<a href="glossary.php?ltr='+ltr+'&print=1" target="_blank"><img src="images/btn_printFriendly.gif" alt="Print this page" width="146" height="17" border="0" /></a>'
	
}

// send the request for an ingredient
function showIngrdnt(ingrdnt)
{ 
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null)
 	{
 		alert ("Browser does not support HTTP Request")
 		return
 	} 
	
 	var url="get_glossary.php"
	url=url+"?i="+ingrdnt
	url=url+"&sid="+Math.random()
	xmlHttp.onreadystatechange=stateChanged 
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
	
	var links = document.getElementsByName('alpha')
	for(var i=0;i<links.length;i++)
	{
		links[i].className='nav_alphabet'
	}
	
	document.getElementById('printArea').innerHTML='<a href="glossary.php?ing='+ingrdnt+'&print=1" target="_blank"><img src="images/btn_printFriendly.gif" alt="Print this page" width="146" height="17" border="0" /></a>'

		
}

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