/*this page crates an ajax request object.
this page is included by other pages that need to perform XMLHttpRequest.
*/
var sbajax=false;
if(window.XMLHttpRequest)
	sbajax=new XMLHttpRequest();		//IE 7,mozilla,safari,firefox.opera, mostbrowser
else if(window.ActiveXObject)			//older IE
{
	try { 
		sbajax = new ActiveXObejct("Msxml2.XMLHTTP");
		} catch (e1) {
			try {
				sbajax = new ActiveXObejct("Microsoft.XMLHTTP");
				} catch (e2) {}
			}
}

//if(!sbajax)	
//alert("Some page fuctionality is unavailable.");

///////--------Check chat requests
function sbsc_check_requests()
{
	if(sbajax)
	{
		sbajax.open('get','sc_check_chat_requests.php');
		sbajax.onreadystatechange=sbsc_handle_request;
		sbajax.send(null);
		return false;
	}
}

function sbsc_handle_request()
{
	if((sbajax.readyState==4) && (sbajax.status==200))
	{
		if(!isNaN(sbajax.responseText) && sbajax.responseText > 0)
		{
			sbnotify_chat_requests(sbajax.responseText);
		//	clearInterval(sbtimer_id);
		}
	}
}

///////--------Check chat request replies
function sbsc_check_request_reply(id)
{
	if(sbajax)
	{
		sbajax.open('get','sc_check_chat_request_reply.php?sb_id=' + id);
		sbajax.onreadystatechange=sbsc_handle_request_reply;
		sbajax.send(null);
		return false;
	}
}

function sbsc_handle_request_reply()
{
	if((sbajax.readyState==4) && (sbajax.status==200))
	{
		if(!isNaN(sbajax.responseText) && sbajax.responseText > 1 && sbajax.responseText < 5 )	//means 2 to 4
		{
			sbnotify_chat_reply(sbajax.responseText);
		}
	}
}
///////--------Update chat window
function sbsc_update_chat_window(id, current_span_id)
{
	if(sbajax)
	{
		sbajax.open('get','sc_update_chat_window.php?sb_id=' + id + '&id=' + current_span_id);
		sbajax.onreadystatechange=sbsc_handle_update_chat_window;
		sbajax.send(null);
		return false;
	}
}

function sbsc_handle_update_chat_window()
{
	if((sbajax.readyState==4) && (sbajax.status==200))
	{
		if(sbajax.responseText.length > 0)	
		{
			if(parseInt(sbajax.responseText) == 555)
			{
				clearInterval(sbUpdateChatTimer);
				sbforce_quit();
			}
			else
				sbaddNode(sbajax.responseText);
		}
	}
}

//////////--------Search sugessions
function show_suggestion()
{	
	if(sbajax)
	{
		sbajax.open('get','gd_show_suggestions.php');
		sbajax.onreadystatechange=handle_show_suggestion;	
		sbajax.send(null);
		return false;
	}
}
var wordarr=new Array();
function handle_show_suggestion()
{		
	if((sbajax.readyState==4) && (sbajax.status==200))
		wordarr=sbajax.responseText.split(/<br>/);

}
	var TAB = 9;
	var ESC = 27;
	var KEYUP = 38;
	var KEYDN = 40;
	var ENTER = 13;
	highlighted = "";
	pupupid="";
	fieldid="";
function search_text(fieldname,ncpopup,evt1)
{
	fieldid=fieldname;
	fieldid.className="";
	str=fieldid.value;
	pupupid=ncpopup;
	//var hey = (evt1)?evt1.target:window.event.srcElement;
	var key = getKeyCode(evt1);
	switch(key)
	{
	//The control keys were already handled by onkeydown, so do nothing.
	case TAB:
	case ESC:
	case KEYUP:
	case KEYDN:
		return;
	case ENTER:
		return false;
		break;
	default:
		//alert(key);
		if(str!="")
		{
			document.getElementById(pupupid).innerHTML="";
			document.getElementById(pupupid).style.display='block';
			//alert(wordarr.length)
			for(var i=0; i < wordarr.length;i++)
			{
				var thisstr=wordarr[i];
				
				if(thisstr.toLowerCase().indexOf(str.toLowerCase())==0)//search for starting text
				{
					var tempdiv=document.createElement("div");
					
					tempdiv.innerHTML=thisstr;
					tempdiv.onclick=makeChoice;
					fieldid.onkeydown=keyselction;
					tempdiv.className="suggession";
					tempdiv.onmouseover = function(){ highlightThis(this,'y')}
					tempdiv.onmouseout  = function(){ highlightThis(this,'n')}
					document.getElementById(pupupid).appendChild(tempdiv);
					
				}
			}
			
			var ncfound=document.getElementById(pupupid).childNodes.length;
			if(ncfound==0)
			{
				fieldid.className="error";
				hidpopup();
			}
			//if(ncfound==1)
			//{
			//	fieldid.value=document.getElementById("popups").firstChild.innerHTML;
			//	document.getElementById("popups").firstChild.innerHTML="";
			//}
		}else
		hidpopup();
	}
}

	function highlightThis(obj,yn){
	//alert(fieldid.value);
		if (yn == 'y'){
			highlighted.className = 'suggession';
			highlighted = obj;
			highlighted.className = 'keyselection';
			fieldid.value=highlighted.innerHTML;
		}else{
			highlighted.className = 'suggession';
			highlighted = '';
		}
	}

function makeChoice(evt)
{	
	var thisDiv = (evt)?evt.target:window.event.srcElement;
	fieldid.value=thisDiv.innerHTML;
	hidpopup();
}
function makeChoicetab(highlighted)
{	
	fieldid.value=highlighted.innerHTML;
}
function keyselction(evt)
{	
	var key = getKeyCode(evt);
	switch(key)
	{
		case TAB:
		case ENTER:
			if (highlighted != '' && highlighted != null ){
				//acChoose(me.highlighted.id);
				makeChoicetab(highlighted);
			}
			hidpopup();
			return false;
		break;

		case ESC:
			hidpopup();
			return false;
		break;

		case KEYUP:
			changeHighlight('up');
			return false;
		break;

		case KEYDN:
			changeHighlight('down');
			return false;
		break;
	}
	
}
function hidpopup()
{
	document.getElementById(pupupid).innerHTML="";
	document.getElementById(pupupid).style.display='none';
}
function changeHighlight(way){
	obj=document.getElementById(pupupid);
	fill_obj=fieldid;
	if(obj.style.display=='none')//if pop not displayed return
	return;
		if (highlighted != '' && highlighted != null ){
			highlighted.className = 'suggession';

			switch(way){
				case 'up':
					if(obj.firstChild == highlighted){
						highlighted = obj.lastChild;
					}else{
						highlighted = highlighted.previousSibling;
					}
				break;
				case 'down':
					if(obj.lastChild == highlighted){
						highlighted = obj.firstChild;
					}else{
						highlighted = highlighted.nextSibling;
					}
				break;
				
			}
			fill_obj.value=highlighted.innerHTML;
			highlighted.className = 'keyselection';
			//me.highlighted.className = 'selected';
			//me.setElemValue();
		}else{
			switch(way){
				case 'up':
					highlighted = obj.lastChild;
				break;
				case 'down':
					highlighted =obj.firstChild;
				break;
				
			}
			fill_obj.value=highlighted.innerHTML;
			highlighted.className = 'keyselection';
			//me.setElemValue();
		}
	}
function getKeyCode(ev)
{
	if(ev)			//Moz
	{
		return ev.keyCode;
	}
	if(window.event)	//IE
	{
		return window.event.keyCode;
	}
};