طريقة توهج الروابط عند مرور الماوس

    <!-- Example of  Normal LINK -->

    <!-- Example of MouseOver Text -->
     <SPAN name="rl" onmouseover="doRainbow(this);" and onmouseout="stopRainbow();"></SPAN>


    <!-- Copy-Paste the code below into your HTML document -->
    <!--  just above </BODY> Tag -->

    <SCRIPT LANGUAGE="JavaScript">
    <!-- ;

    /*********************************************************************/
    /* Rainbow Links or Text                                            */
    /* This script and many more are available free online at            */
    /* http://rainbow.arch.scriptmania.com                              */
    /*                                                                  */
    /* Usage:                                                            */
    /* Insert just above end/close BODY Tag,                            */
    /* For Links                                                        */
    /* You don't need to add "onMouseover" and "onMouseout" attributes!! */
    /*                                                                  */
    /* If you'd like to add effect to other text, then                  */
    /* add 'onmouseover="doRainbow(this);"' and                          */
    /* 'onmouseout="stopRainbow();"' to the target tags.                */
    /*                                                                  */
    /* This Script works with IE4,Netscape6,Mozilla browser and above,  */
    /* but no error occurs on other browsers.                            */
    /*********************************************************************/


    // Setting
    //- SPEED CAN BE CHANGED HERE -

    var rate = 25;  // Increase-Decrease amount ( Higher=Faster )

    // - DO NOT ALTER BELOW -
    // Main routine

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

    var objActive;
    var act = 0;
    var elmH = 0;
    var elmS = 128;
    var elmV = 255;
    var clrOrg;
    var TimerID;

    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;
    }
    function doRainbow(obj)
    {
        if (act == 0) {
            act = 1;
            if (obj)
                objActive = obj;
            else
                objActive = event.srcElement;
            clrOrg = objActive.style.color;
            TimerID = setInterval("ChangeColor()",100);
        }
    }
    function stopRainbow()
    {
        if (act) {
            objActive.style.color = clrOrg;
            clearInterval(TimerID);
            act = 0;
        }
    }
    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);
            }
        }
    }
    function stopRainbowAnchor()
    {
        if (act) {
            if (objActive.tagName == 'A') {
                objActive.style.color = clrOrg;
                clearInterval(TimerID);
                act = 0;
            }
        }
    }
    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);
            }
        }
    }
    function Mozilla_stopRainbowAnchor(e)
    {
        if (act) {
            if (objActive.nodeName == 'A') {
                objActive.style.color = clrOrg;
                clearInterval(TimerID);
                act = 0;
            }
        }
    }
    function ChangeColor()
    {
        objActive.style.color = makeColor();
    }
    function makeColor()
    {
       
        // 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;
    }
    // end hide -->
    </SCRIPT>