TẠO LINK NHẤP NHÁY ĐỔI MÀU KHI RÊ CHUỘT VÀO

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    <script type='text/javascript'> 
//<![CDATA[ 
var rate = 20; 
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; 
} 
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() 
{ 
    // 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; 
}
//]]> 
</script>
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