> 
Fade Link
link that gradually changes of color when you pass the mouse over.
<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
/*************
**** <config>
**/
fadeColor = "#7A9EC5"; // color to fade to
//fadeColor = "#0";
stepIn = 17; // delay when fading in
stepOut = 25; // delay when fading out
/* set to true or false; true will
** cause all links to fade automatically
** (you won't need to add class="fade")
***/
autoFade = false;
/* set to true or false; true will cause all CSS
** classes with "fade" in them to fade onmouseover
***/
sloppyClass = true;
/* set to true or false; true will make the script
** work for Macs (IE 5+), but you will have to give
** a name (name="blah") to each link that you want
** to fade.
***/
macCompat = false;
/**
**** </config>
**************/
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;
}
