function createRequestObject(){
	var request_o; //declare the variable to hold the object.
	var browser = navigator.appName; //find the browser name
	if(browser == "Microsoft Internet Explorer"){
		/* Create the object using MSIE's method */
		request_o = new ActiveXObject("Microsoft.XMLHTTP");
	}else{
		/* Create the object using other browser's method */
		request_o = new XMLHttpRequest();
	}
	return request_o; //return the object
}

var http = createRequestObject(); 

function formatPost(obj){
	var ret = "";
	var c = 0;
	for(var i in obj){
		if(c > 0){
			ret += "&";
		}		
		ret += i + "=" + obj[i];
		c++;
	}
	return ret;
}

function getLetter(letter){
	
	
	
	var sendVars = new Object();
	sendVars.first_letter = letter;
		
	
	var params = formatPost(sendVars);
	
	http.open('post','livesearch.php',true);
	http.onreadystatechange = displayResults;
	http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	http.setRequestHeader("Content-length", params.length);
	http.setRequestHeader("Connection", "close");
	http.send(params);
			
}


function displayResults(){
	
	if(http.readyState == 1){
		document.getElementById('search_results').innerHTML = "Loading...";
	}
		
	if(http.readyState == 4){ //Finished loading the response
		if(http.status == 200){
			document.getElementById('search_results').innerHTML = http.responseText;
		}
	}
}