링크에 마우스가 올라오면 링크가 무지개 빛으로 바뀌는 소스

<script language="JavaScript">
<!--
/* Rainbow Link Version 1.00 (1999.6.10)                                */
/* Copyright (C) 1999-2001 TAKANASHI Mizuki                             */
/* takanasi@hamal.freemail.ne.jp                                        */

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


var obj;        // 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

document.onmouseover = doRainbowAnchor;
document.onmouseout = stopRainbowAnchor;

function doRainbow()
{
	if (act != 1) {
		act = 1;
		obj = event.srcElement;
		clrOrg = obj.style.color;
		TimerID = setInterval("ChangeColor()",100);
	}
}

function stopRainbow()
{
	if (act != 0) {
		obj.style.color = clrOrg;
		clearInterval(TimerID);
		act = 0;
	}
}


function doRainbowAnchor()

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

function stopRainbowAnchor()
{
	if (act != 0) {
		if (obj.tagName == 'A') {
			obj.style.color = clrOrg;
			clearInterval(TimerID);
			act = 0;
		}
	}
}

function ChangeColor()
{
	obj.style.color = makeColor();
}

function makeColor()
{
	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);
	elmG = Math.floor(elmG);
	elmB = Math.floor(elmB);
	clrRGB = '#' + elmR.toString(16) + elmG.toString(16) + elmB.toString(16);

	elmH = elmH + rate;
	if (elmH >= 360)
	elmH = 0;

	return clrRGB;

}
//-->
</script>

<a href="#">링크에 마우스가 올라오면 무지개 빛으로 반짝반짝</a><br>
<a href="#">링크에 마우스가 올라오면 무지개 빛으로 반짝반짝</a><br>