var xmlhttp = null;

function friend (iFriendUserId, sAction) {

	var sURL = "friend.php";
	var sQueryString = "f=" + iFriendUserId + "&a=" + sAction;

	if (window.XMLHttpRequest) {// code for Mozilla, Safari, etc
		xmlhttp = new XMLHttpRequest();
		xmlhttp.onreadystatechange = handleFriendResult;
		xmlhttp.open("POST",sURL,true);
		xmlhttp.setRequestHeader('content-type', 'application/x-www-form-urlencoded');
		xmlhttp.send(sQueryString);
	} else if (window.ActiveXObject) {//IE
		xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
		if (xmlhttp) {
			xmlhttp.onreadystatechange = handleFriendResult;
			xmlhttp.open("POST",sURL,true);
			xmlhttp.setRequestHeader('content-type', 'application/x-www-form-urlencoded');
			xmlhttp.send(sQueryString);
		}
	}
}

function handleFriendResult () {
	if (xmlhttp.readyState == 4) {
		if (xmlhttp.status == 200) {
			var oXML = xmlhttp.responseXML;
			var oRedirect = oXML.getElementsByTagName("redirect").item(0);
			if (oRedirect) {
				self.location = oRedirect.getAttribute("url");
			} else {
				var oError = oXML.getElementsByTagName("e").item(0);
				if (oError) {
					alert (oError.getAttribute("m"));
				} else {
					updateFriend (xmlhttp.responseText);
				}
			}
			xmlhttp = null;
		}
	}
}

function updateFriend (sLink) {
	var oFriend = document.getElementById ('friend');
	oFriend.innerHTML = sLink;
}





CsFriendList = function() {

	this.getResponse = function( id, status ) {	

		if( DrAjax.statuses[ status ] == 'Complete' ) {
			
			var xml = DrAjax.getResponse( id );
			
			var redirect = xml.getElementsByTagName("redirect").item(0);
			if ( redirect ) {
				self.location = redirect.getAttribute("url");
			} else {
				var error = xml.getElementsByTagName("e").item(0);
				if ( error ) {
					alert ( error.getAttribute("m") );
				} else {
					parseResponse( xml );
				}
			}

		}
			
	}
	
	var parseResponse = function( xml ) {

		var friendList = xml.getElementsByTagName( 'friendList' ).item(0);
		var befriendList = xml.getElementsByTagName( 'befriendList' ).item(0);
		
		$( 'FriendList' ).innerHTML = friendList.getAttribute( 'c' );
		$( 'BefriendList' ).innerHTML = befriendList.getAttribute( 'c' );
		
	}
	
	
	this.add = function( id ) {
		DrAjax.sendRequest( 'AjaxServer.php', this.getResponse, 'call=User.addFriend&id=' + id );
	}
	
	this.remove = function( id ) {
		DrAjax.sendRequest( 'AjaxServer.php', this.getResponse, 'call=User.removeFriend&id=' + id );
	}
	
}

FriendList = new CsFriendList();