var xmlHttp = getXmlHttp();
var xmlHttp4 = getXmlHttp();
var symbol = '';

function getXmlHttp()
{
	try
	{
		xmlHttp = new ActiveXObject("Msxml2.xmlHttp");
	}
	catch (e)
	{
		try
		{
			xmlHttp = new ActiveXObject("Microsoft.xmlHttp");
		}
		catch (E)
		{
			xmlHttp = false;
		}
	}

	if (!xmlHttp && typeof XMLHttpRequest!='undefined')
	{
		try
		{
			xmlHttp = new XMLHttpRequest();
		}
		catch (e)
		{
			xmlHttp=false;
		}
	}

	if (!xmlHttp && window.createRequest)
	{
		try
		{
			xmlHttp = window.createRequest();
		}
		catch (e)
		{
			xmlHttp=false;
		}
	}

	return xmlHttp;
}

function startDataUpdate(s)
{
	symbol = s;
	window.setInterval("fetchData(symbol)",3000);
}

function fetchData()
{
	if (!xmlHttp)
	{
		return;
	}
	document.getElementById("updateSpin").src = 'updating.gif';
	xmlHttp.open("GET", "rawbook_guest.php?symbol="+escape(symbol), true);
	xmlHttp.onreadystatechange=handleData;
	xmlHttp.send(null);
}

function handleData()
{
	if (xmlHttp.readyState == 4)
	{
		var noChangeColor = 'transparent';
		var positiveColor = '#90ee90';
		var negativeColor = '#ffb6c1';

//		window.setTimeout("fetchData(symbol)",2000);
		data = eval("(" + xmlHttp.responseText + ")");
		document.getElementById("tickSize").innerHTML = data.tickSize;
		document.getElementById("lastPrice").innerHTML = data.lastPrice;
		t = document.getElementById("bookTable").tBodies[0];
		orderBook = data.book;
		dlen = orderBook.length;
		tlen = t.rows.length;
		l = Math.max(dlen,tlen);
		for (i = 0; i < l; i++)
		{
			if (i < dlen)
			{
				var row;
				if (i < tlen)
				{
					row = t.rows[i];
				}
				else
				{
					row = t.insertRow(-1);
					row.insertCell(-1);
					row.insertCell(-1);
					row.insertCell(-1);
					row.insertCell(-1);
				}

				if (i == 0)
				{
					var lastBid = 0;
					var lastAsk = 0;
					var lastBidSize = 0;
					var lastAskSize = 0;
					var bid = 0;
					var ask = 0;
					var bidSize = 0;
					var askSize = 0;

					if (row.cells[0].innerHTML != '')
					{
						lastBidSize = parseInt(row.cells[0].innerHTML);
						lastBid = parseFloat(row.cells[1].innerHTML);
					}
					if (row.cells[2].innerHTML != '')
					{
						lastAsk = parseFloat(row.cells[2].innerHTML);
						lastAskSize = parseInt(row.cells[3].innerHTML);
					}

					if (orderBook[0][0][0] != '')
					{
						bid = parseFloat(orderBook[0][0][0]);
						bidSize = parseInt(orderBook[0][0][1]);
					}
					if (orderBook[0][1][0] != '')
					{
						ask = parseFloat(orderBook[0][1][0]);
						askSize = parseInt(orderBook[0][1][1]);
					}

					if (lastBid == bid || (lastBid != 0 && bid == 0))
					{
						row.cells[1].style.backgroundColor = noChangeColor;
					}
					else
					{
						if (lastBid < bid || lastBid == 0)
						{
							row.cells[1].style.backgroundColor = positiveColor;
						}
						else
						{
							row.cells[1].style.backgroundColor = negativeColor;
						}
					}

					if (lastAsk == ask || (lastAsk != 0 && ask == 0))
					{
						row.cells[2].style.backgroundColor = noChangeColor;
					}
					else
					{
						if (lastAsk > ask || lastAsk == 0)
						{
							row.cells[2].style.backgroundColor = positiveColor;
						}
						else
						{
							row.cells[2].style.backgroundColor = negativeColor;
						}
					}
				}
				

				row.cells[0].innerHTML=orderBook[i][0][1];
				row.cells[1].innerHTML=orderBook[i][0][0];
				row.cells[2].innerHTML=orderBook[i][1][0];
				row.cells[3].innerHTML=orderBook[i][1][1];
			}
			else
			{
				t.deleteRow(t.rows.length-1);
			}
		}

		document.getElementById("updateSpin").src = 'updatedone.gif';
	}
}

function getChartHTML(sym)
{
	xmlHttp4.open("GET", "chart.php?symbol="+escape(sym), true);
	xmlHttp4.onreadystatechange=chartHandler;
	xmlHttp4.send(null);
}

function chartHandler()
{
	if (xmlHttp4.readyState == 4)
	{
		document.getElementById("chart").innerHTML = xmlHttp4.responseText;
	}
}