> 
Fade Link
link che cambia gradualmente di colore quando ci si passa sopra con il mouse.
¤ Clicca qui per visualizzare la demo... ¤
<head>
File fade.js
// Configurazione
<head>
<script language="Javascript" src="fade.js"></script>
</head><font face="verdana">
<h1><a href="#" class="fade">Clicca sul link</a></h1></font>
File fade.js
// Configurazione
fadeColor = "#7A9EC5";
stepIn = 17;
stepOut = 25;
autoFade = false;
sloppyClass = true;
macCompat = false;
//Codice
hexa = new makearray(16);
for(var i = 0; i < 10; i++)
hexa[i] = i;
hexa[10] = "a";
hexa[11] = "b";
hexa[12] = "c";
hexa[13] = "d";
hexa[14] = "e";
hexa[15] = "f";
document.onmouseover = domouseover;
document.onmouseout = domouseout;
fadeColor = dehexize(fadeColor.toLowerCase());
var fadeId = new Array();
function dehexize(Color)
{
var colorArr = new makearray(3);
for (i=1; i<7; i++)
{
for (j=0; j<16; j++)
{
if (Color.charAt(i) == hexa[j])
{
if (i%2 !=0)
colorArr[Math.floor((i-1)/2)]=eval(j)*16;
else
colorArr[Math.floor((i-1)/2)]+=eval(j);
}
}
}
return colorArr;
}
function domouseover()
{
if (document.all)
{
var srcElement = event.srcElement;
if ((srcElement.tagName == "A" &&
autoFade &&
srcElement.className != "nofade") ||
srcElement.className == "fade" ||
(sloppyClass && srcElement.className.indexOf("fade") != -1))
{
if (!srcElement.startColor)
{
srcElement.startColor = (srcElement.style.color)? srcElement.style.color : srcElement.currentStyle.color;
srcElement.startColor = dehexize(srcElement.startColor.toLowerCase());
}
var link = (macCompat ? srcElement.name : srcElement.uniqueID);
if (link)
fade(srcElement.startColor,fadeColor,link,stepIn);
else if (macCompat)
alert("Error: Mac Compatility mode enabled, but link has no name.");
}
}
}
function domouseout()
{
if (document.all)
{
var srcElement = event.srcElement;
if ((srcElement.tagName == "A" && autoFade && srcElement.className != "nofade") ||
srcElement.className == "fade" ||
(sloppyClass && srcElement.className.indexOf("fade") != -1))
{
var link = (macCompat ? srcElement.name : srcElement.uniqueID);
if (link)
fade(fadeColor,srcElement.startColor,link,stepIn);
}
}
}
function makearray(n)
{
this.length = n;
for (var i = 1; i <= n; i++)
this[i] = 0;
return this;
}
function hex(i)
{
if (i < 0)
return "00";
else if (i > 255)
return "ff";
else
return "" + hexa[Math.floor(i/16)] + hexa[i%16];
}
function setColor(r, g, b, element)
{
var hr = hex(r);
var hg = hex(g);
var hb = hex(b);
element.style.color = "#" + hr + hg + hb;
}
function fade(s,e,element,step)
{
var sr = s[0];
var sg = s[1];
var sb = s[2];
var er = e[0];
var eg = e[1];
var eb = e[2];
if (fadeId[0] != null && fade[0] != element && eval(fadeId[0]))
{
var orig = eval(fadeId[0]);
setColor(orig.startColor[0], orig.startColor[1], orig.startColor[2], orig);
var i = 1;
while (i < fadeId.length)
{
clearTimeout(fadeId[i]);
i++;
}
}
for (var i = 0; i <= step; i++)
{
fadeId[i+1] = setTimeout("setColor(Math.floor(" + sr +
" *(( " + step + " - " + i + " )/ " + step + " ) + " + er + " * (" + i + "/" +
step + ")), Math.floor(" + sg + " * (( " + step + " - " + i + " )/ " + step +
" ) + " + eg + " * (" + i + "/" + step + ")), Math.floor(" + sb +
" * ((" + step + "-" + i + ")/" + step + ") + " + eb +
" * (" + i + "/" + step + "))," + element + ");", i*step);
}
fadeId[0] = element;
}
