/*===================*\
|| ################# ||
|| # Configuration # ||
|| ################# ||
\*===================*/

var rate = 20; // Increase amount(The degree of the transmutation)

/*============================================*\
|| ########################################## ||
|| # Main routine 			    # ||
|| # Never touch behind this avertissment!! # ||
|| ########################################## ||
\*============================================*/

if (document.getElementById)
{
	window.onerror = new Function("return true")
}

var objActive; // The object which event occured in
var act = 0; // Flag during the action
var elmH = 0; // Hue
var elmS = 128; // Saturation
var elmV = 255; // Value
var clrOrg; // A color before the change
var TimerID; // Timer ID


if (document.all)
{
	document.onmouseover = doRainbowAnchor;
	document.onmouseout = stopRainbowAnchor;
}
else if (document.getElementById)
{
	document.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT);
	document.onmouseover = Mozilla_doRainbowAnchor;
	document.onmouseout = Mozilla_stopRainbowAnchor;
}

/*================================================*\
|| ############################################## ||
|| # doRainbow					# ||
|| # This function begins to change a color.    # ||
|| ############################################## ||
\*================================================*/
function doRainbow(obj)
{
	if (act == 0)
	{
		act = 1;
		if (obj)
		{
			objActive = obj;
		}
		else
		{
			objActive = event.srcElement;
		}
		clrOrg = objActive.style.color;
		TimerID = setInterval("ChangeColor()",100);
	}
}

/*================================================*\
|| ############################################## ||
|| # stopRainbow				# ||
|| # This function stops to change a color.     # ||
|| ############################################## ||
\*================================================*/
function stopRainbow()
{
	if (act)
	{
		objActive.style.color = clrOrg;
		clearInterval(TimerID);
		act = 0;
	}
}

/*================================================================================*\
|| ############################################################################## ||
|| # doRainbowAnchor								# ||
|| # This function begins to change a color (of a anchor, automatically)	# ||
|| ############################################################################## ||
\*================================================================================*/
function doRainbowAnchor()
{
	if (act == 0)
	{
		var obj = event.srcElement;
		while (obj.tagName != 'A' && obj.tagName != 'BODY')
		{
			obj = obj.parentElement;
			if (obj.tagName == 'A' || obj.tagName == 'BODY')
			{
				break;
			}
		}

		if (obj.tagName == 'A' && obj.href != '')
		{
			objActive = obj;
			act = 1;
			clrOrg = objActive.style.color;
			TimerID = setInterval("ChangeColor()", 100);
		}
	}
}

/*================================================================================*\
|| ############################################################################## ||
|| # stopRainbowAnchor								# ||
|| # This function stops to change a color. (of a anchor, automatically)	# ||
|| ############################################################################## ||
\*================================================================================*/
function stopRainbowAnchor()
{
	if (act)
	{
		if (objActive.tagName == 'A')
		{
			objActive.style.color = clrOrg;
			clearInterval(TimerID);
			act = 0;
		}
	}
}

/*================================================================================*\
|| ############################################################################## ||
|| # Mozilla_doRainbowAnchor(for Netscape6 and Mozilla browser)			# ||
|| # This function begins to change a color. (of a anchor, automatically)	# ||
|| ############################################################################## ||
\*================================================================================*/
function Mozilla_doRainbowAnchor(e)
{
	if (act == 0)
	{
		obj = e.target;
		while (obj.nodeName != 'A' && obj.nodeName != 'BODY')
		{
			obj = obj.parentNode;
			if (obj.nodeName == 'A' || obj.nodeName == 'BODY')
			{
				break;
			}
		}

		if (obj.nodeName == 'A' && obj.href != '')
		{
			objActive = obj;
			act = 1;
			clrOrg = obj.style.color;
			TimerID = setInterval("ChangeColor()", 100);
		}
	}
}

/*================================================================================*\
|| ############################################################################## ||
|| # Mozilla_stopRainbowAnchor(for Netscape6 and Mozilla browser)		# ||
|| # This function stops to change a color. (of a anchor, automatically)	# ||
|| ############################################################################## ||
\*================================================================================*/
function Mozilla_stopRainbowAnchor(e)
{
	if (act)
	{
		if (objActive.nodeName == 'A')
		{
			objActive.style.color = clrOrg;
			clearInterval(TimerID);
			act = 0;
		}
	}
}

/*===============================================*\
|| ############################################## ||
|| # Change Color				# ||
|| # This function changes a color actually.	# ||
|| ############################################## ||
\*===============================================*/
function ChangeColor()
{
	objActive.style.color = makeColor();
}

/*===============================================*\
|| ############################################## ||
|| # makeColor					# ||
|| # This function makes rainbow colors.	# ||
|| ############################################## ||
\*===============================================*/
function makeColor()
{
	// Don't you think Color Gamut to look like Rainbow?

	// HSVtoRGB
	if (elmS == 0)
	{
		elmR = elmV;
		elmG = elmV;
		elmB = elmV;
	}
	else
	{
		t1 = elmV;
		t2 = (255 - elmS) * elmV / 255;
		t3 = elmH % 60;
		t3 = (t1 - t2) * t3 / 60;

		if (elmH < 60)
		{
			elmR = t1;
			elmB = t2;
			elmG = t2 + t3;
		}
		else if (elmH < 120)
		{
			elmG = t1;
			elmB = t2;
			elmR = t1 - t3;
		}
		else if (elmH < 180)
		{
			elmG = t1;
			elmR = t2;
			elmB = t2 + t3;
		}
		else if (elmH < 240)
		{
			elmB = t1;
			elmR = t2;
			elmG = t1 - t3;
		}
		else if (elmH < 300)
		{
			elmB = t1;
			elmG = t2;
			elmR = t2 + t3;
		}
		else if (elmH < 360)
		{
			elmR = t1;
			elmG = t2;
			elmB = t1 - t3;
		}
		else
		{
			elmR = 0;
			elmG = 0;
			elmB = 0;
		}
	}

	elmR = Math.floor(elmR).toString(16);
	elmG = Math.floor(elmG).toString(16);
	elmB = Math.floor(elmB).toString(16);

	if (elmR.length == 1)
	{
		elmR = "0" + elmR;
	}

	if (elmG.length == 1)
	{
		elmG = "0" + elmG;
	}

	if (elmB.length == 1)
	{
		elmB = "0" + elmB;
	}

	elmH = elmH + rate;

	if (elmH >= 360)
	{
		elmH = 0;
	}

	return '#' + elmR + elmG + elmB;
}