var perline = 8;
var divSet = false;
var curElem;
var colourLevels = Array('2', '4', '6', '8', 'A', 'C', 'E', 'F');
var colourArray = Array();
var doiframe = (browser == "Internet Explorer");
var nocolour = '';
var customMode = false;
//if (document.all) { nocolour = ''; }

function pickColour(elem)
{
	if (!divSet) { setDiv(); }
	var picker = getObj('colourpicker');
	if (doiframe) var iframe = getObj('cpiframe');
	if (elem == curElem && picker.style.display == 'block')
	{
		picker.style.display = 'none';
		if (doiframe) iframe.style.display = 'none';
		return;
	}
	curElem = elem;
	picker.style.top = getAbsoluteOffsetTop(elem) + 20 + "px";
	picker.style.left = getAbsoluteOffsetLeft(elem) + "px";
	customMode = false;
	if (doiframe)
	{
		iframe.style.top = picker.style.top;
		iframe.style.left = picker.style.left;
		iframe.style.width = "262px";
		iframe.style.height = "274px";
		iframe.style.display = 'block';
	}
	picker.style.display = 'block';
}

function relateColour(colour)
{
	if (customMode) return;
	var picker = getObj('colourpicker');
	var hiddenInput = curElem.getElementsByTagName("input")[0];
	var pickerInput = picker.getElementsByTagName("input")[0];
	if (colour == '')
		colour = nocolour;
	curElem.style.backgroundColor = colour;
	hiddenInput.value = colour;
	pickerInput.value = colour;
	
	eval(curElem.getElementsByTagName("span")[0].title);
}

function setColour(colour, noClose)
{
	if (customMode) return;
	var picker = getObj('colourpicker');
	if (colour == '')
		colour = nocolour;
	if (!noClose)
	{
		picker.style.display = 'none';
		if (doiframe)
		{
			var iframe = getObj('cpiframe');
			iframe.style.display = 'none';
		}
	}
	eval(curElem.title);
}

function checkCustom()
{
	var picker = getObj('colourpicker');
	var colourInput = picker.getElementsByTagName("input")[0].value;
	if (customMode)
	{
		if (colourInput == "") customMode = false;
		else
		{
			if (colourInput.length == 7 && colourInput.indexOf("#") == 0)
			{
				customMode = false;
				relateColour(colourInput);
				setColour(colourInput, true);
				customMode = true;
			}
		}
	}
	else
		if (colourInput != "") customMode = true;
}

function setDiv()
{
	if (!document.createElement) { return; }
	var elemDiv = document.createElement('div');
	if (typeof(elemDiv.innerHTML) != 'string') { return; }
	genColours();
	elemDiv.id = 'colourpicker';
	elemDiv.style.position = 'absolute';
	elemDiv.style.display = 'none';
	elemDiv.style.border = 'solid 1px black';
	elemDiv.style.zIndex = 5;
	elemDiv.innerHTML = '<table cellspacing="0" cellpadding="0" style="background-color: white;">'
	+ '<tr><td colspan="2">' + getColourTable(0, 8) + '</td>'
	+ '<td colspan="2">' + getColourTable(8, 16) + '</td></tr>'
	+ '<tr><td colspan="2">' + getColourTable(16, 80) + '</td>'
	+ '<td colspan="2">' + getColourTable(80, 144) + '</td></tr>'
	+ '<tr><td colspan="2">' + getColourTable(144, 208) + '</td>'
	+ '<td colspan="2">' + getColourTable(208, 272) + '</td></tr>'
	+ '<tr><td align="center" style="cursor: pointer; border-top: solid 1px black; border-right: solid 1px black" onclick="setColour(\'\')" onmouseover="relateColour(\'\')">None</td>'
	+ '<td align="center" style="cursor: pointer; border-top: solid 1px black; border-right: solid 1px black" onclick="setColour(\'transparent\')" onmouseover="relateColour(\'transparent\')">Transparent</td>'
	+ '<td align="right" style="border-top: solid 1px black;">Custom :</td>'
	+ '<td align="right" style="border-top: solid 1px black;"><input style="border: 0; border-left: solid 1px #CCCCCC;" size="10" maxlength="7" onclick="if (!customMode) this.value = \'\';" onkeyup="checkCustom()" type="text" /></td></tr>'
	+ '</table>';
	
	document.body.appendChild(elemDiv);

	if (doiframe)
	{
		var iframeDiv = document.createElement('iframe');
		iframeDiv.id = 'cpiframe';
		iframeDiv.style.position = 'absolute';
		iframeDiv.style.display = 'none';
		iframeDiv.style.border = '0';
		iframeDiv.style.zIndex = 4;
		document.body.appendChild(iframeDiv);
	}
	
	divSet = true;
}

function getColourTable(start, end)
{
	var colours = colourArray;
	var tableCode = '';
	if (end > colours.length) end = colours.length;
	tableCode += '<table cellspacing="0" cellpadding="0" style="cursor: pointer; border-collapse: collapse; float: left">';
	for (i = start; i < end; i++) {
		if (i % perline == 0) { tableCode += '<tr>'; }
		tableCode += '<td onmouseover="relateColour(\'' + colours[i] + '\')" style="width: 15px; height: 15px; border: solid 1px white; background-color: ' + colours[i] + '" onclick="setColour(\'' + colours[i] + '\');"></td>' 
		if (i % perline == perline - 1) { tableCode += '</tr>'; }
	}
	if (i % perline != 0) { tableCode += '</tr>'; }
	tableCode += '</table>';
	return tableCode;
}

function genColours()
{
	for (a = 0; a < 10; a++)
		addColourValue(a,a,a);
	addColourValue('A','A','A');
	addColourValue('B','B','B');
	addColourValue('C','C','C');
	addColourValue('D','D','D');
	addColourValue('E','E','E');
	addColourValue('F','F','F');

	for (a = 0; a < colourLevels.length; a++)
	{
		for (c = 0; c < colourLevels.length; c++)
			addColour(c,a,0);
	}
	
	for (a = 0; a < colourLevels.length; a++)
	{
		for (c = 0; c < colourLevels.length; c++)
			addColour(0,c,a);
	}
	
	for (a = 0; a < colourLevels.length; a++)
	{
		for (c = 0; c < colourLevels.length; c++)
			addColour(a,0,c);
	}
	
	addExtraColours(2, 1, 1);
	addExtraColours(2, 1, 2);
	addExtraColours(1, 2, 1);
	addExtraColours(2, 3, 1);
	addExtraColours(1, 2, 2);
	addExtraColours(1, 1, 2);
	addExtraColours(1, 2, 3);
	addExtraColours(2, 1, 3);

	return colourArray;
}

function addExtraColours(redNum, greenNum, blueNum)
{
	var extraColours = Array('0', '1', '3', '5', '7', '9', 'B', 'D', 'F');
	
	var red = 0; var green = 0; var blue = 0;
	
	for (a = 0; a < extraColours.length - 1; a++)
	{
		var one = a;
		var two = a + 1;
		var three = a + 2;
		
		if (two >= extraColours.length)
			two = extraColours.length - 1;
			
		if (three >= extraColours.length)
			three = extraColours.length - 1;
		
		if (redNum == 1) red = one;
		else if (redNum == 2) red = two;
		else if (redNum == 3) red = three;
		
		if (greenNum == 1) green = one;
		else if (greenNum == 2) green = two;
		else if (greenNum == 3) green = three;
		
		if (blueNum == 1) blue = one;
		else if (blueNum == 2) blue = two;
		else if (blueNum == 3) blue = three;

		addColourValue(extraColours[red], extraColours[green], extraColours[blue]);
	}
}

function addColour(r, g, b) {
	var red = colourLevels[r];
	var green = colourLevels[g];
	var blue = colourLevels[b];
	addColourValue(red, green, blue);
}

function addColourValue(r, g, b) {
	colourArray[colourArray.length] = '#' + r + r + g + g + b + b;
}