17 October 2012

Multi-color links on hover for Blogger

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In this effect when you hover mouse pointer on a link it will change to multi colors. You have seen this effect on many websites.

Lets add this to your Blogger blog.

Go to Layout from your Blogger Dashboard and look for
</head>

Add following code just ABOVE it.


<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>
Finally Save your template. In the above code you can change the color transformation speed by altering the value of
 var rate = 20;
That's it!

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