function searchArray(src, key)
{
	var rc = 0;
	
	for (var i=0; i < src.length; i++)
	{
		if (src[i] == key)
		{
			rc = i + 1;
			break;
		}
	}

	return rc;
}

function Reset_Toc()														// define a reset method
{
	parent.frames[0].document.forms[0].cats.options[0].text = "all";
	parent.frames[0].document.forms[0].cats.options[0].value = "";
	parent.frames[0].document.forms[0].cats.options.length = this.cats.length + 1;

	for (var i = 0; i < this.cats.length; i++)
	{
		parent.frames[0].document.forms[0].cats.options[i+1].text = this.cats[i]; 
		parent.frames[0].document.forms[0].cats.options[i+1].value = this.cats[i];
	}

	var f = parent.frames[0].document.getElementById("to");
	f.setAttribute("value", this.lines[this.lines.length - 1].date);

	f = parent.frames[0].document.getElementById("key");
	f.setAttribute("value", "");

	f = parent.frames[0].document.getElementById("from");
	f.setAttribute("value", this.lines[0].date);

	parent.frames[2].location.href = "toc.html";
}

function Write_Toc(latest, oldest, key, track)								// define a write method
{
	var destination = parent.frames[2].document;
	var replace = parent.frames[2].document.getElementById("placeholder");
	var d = destination.createElement("div");							// create a new div element to render toc

	for (var i = 0; i < this.lines.length; i++)							// loop thru all lines in toc
	{
		if (latest != "")
		{
			if (this.lines[i].date > latest)
			{
				continue;
			}
		}

		if (oldest != "")
		{
			if (this.lines[i].date < oldest)
			{
				continue;
			}
		}

		if (key != "")
		{
			var pattern = new RegExp(key,"i");							// convert key to regular expression
			var result = pattern.test(this.lines[i].text);

			if (result == false)
			{
				continue;
			}
		}

		if (track != "")
		{
			var pattern = new RegExp(track);							// convert track to regular expression
			var result = pattern.test(this.lines[i].cats);

			if (result == false)
			{
				continue;
			}
		}

		var p = destination.createElement("p");
		var a = destination.createElement("a");
		var x = destination.createTextNode(this.lines[i].text);
		var l = this.lines[i].date;

		if (this.lines[i].cats != "")
		{
			l = l + " - " + this.lines[i].cats;
		}
	
		a.setAttribute("href", "javascript:load('" + this.lines[i].href + "',top.opener)");
		a.setAttribute("title", l);
		a.className = "toc";
		a.appendChild(x);
		p.appendChild(a);
		p.className = "toc";
		d.appendChild(p);
	}

	d.setAttribute("id", "placeholder");
	replace.parentNode.replaceChild(d, replace);
}													

function Line(node)															// table of contents's line object constructor
{
	this.href = node.getAttribute("href");									// post url
	this.text = node.firstChild.data;										// post title
	var pattern = /^\d{4}\/\d\d\/\d\d/;
	this.date = pattern.exec(node.getAttribute("title"));					// post date
	var pattern = /^\d{4}\/\d\d\/\d\d - (.*)/;
	var result = pattern.exec(node.getAttribute("title"));
	
	if (result != null)
	{
		this.cats = result[1];
	}
	else
	{
		this.cats="";
	}																		// post categories, separated by ' / '
}

function Toc()																// table of contents object constructor
{
	var l = new Array();													// lines
	var c = new Array();													// categories
	var anchorList = parent.frames[1].document.getElementsByTagName("a"); 	// get a list of the toc html page's links
	var j = 0;
	var m = 0;

	for (var i = 0; i < anchorList.length; i++)								// populate the lines array property
	{
		if (anchorList[i].className == "toc")								// a Toc is an array of Lines objects
		{
			l[j] = new Line(anchorList[i]);
			
			if (l[j].cats != "")
			{
				var ca = l[j].cats.split(" / ");							// split categories into temp array

				for (var k = 0; k < ca.length; k++)
				{
					if (! searchArray(c, ca[k]))
					{
						c[m] = ca[k];
						m++;
					}
				}
			}

			j++;															// with all the links which have toc content
		}
	}
	this.lines = l;
	this.cats = c;

}

Toc.prototype.reset = Reset_Toc;
Toc.prototype.write = Write_Toc;