/******************************************************************
*        Script name: Link fader (http://design64.net/js/linkfader.html)
*        Version: 1.0
*        Date: 12.05.02
*        Usage: Freeware - You may modify this script as you wish,
*                as long as you don't remove this header comment.
*
*        Script by: Fayez Zaheer (viol8r on #webdesign [irc.zanet.org.za])
*        Email: fayez@design64.net
*        Web site: http://design64.net
*         Original idea: http://anarchos.xs.mw/fade.phtml
*       Script featured on JavaScript Kit (http://www.javascriptkit.com)
******************************************************************/

// DELETE COMMENTS THAT START WITH // TO MAKE THE FILE SIZE SMALLER.

// This script will no longer overwrite your current onmouseover and
// onmouseout attributes - it will instead skip those links. If you would
// still like to fade them, add findLink(this.id) to your onmouseover
// and clearFade() to your onmouseout, like so -
// <a href="#" onmouseover="findLink(this.id); yourFunction()"
// onmouseout="clearFade(); yourSecondFunction()">
// Make sure to put it BEFORE any "return" statements otherwise
// the fade will not execute.

// Fade-to colour without the # (6 character value only!)
var fadeTo = "A0E1FF";

// Fade in colour increment/decrement by
var fiBy = 6;

// Fade out colour increment/decrement by
var foBy = 10;

// Speed - milliseconds between each colour change in the fade
// Less than 10ms doesn't really make all that much difference, so
// 10 is the minimum effective value.
var speed = 10;

// Class name of links to NOT fade (i.e. ignore)
// var ignoreClass = "somebogusvalue" if you don't want to
// use this feature. Alternatively, add onmouseover="clearFade()"
// to the link you do not wish to fade.
var ignoreClass = "ignore";

// No more changes required (unless you know what you are doing)
// Enjoy... and email me and let me know what site(s) you are using it on :)
var opera, ie, dom, x = 0, oc, fader, ocs = new Array();

if (navigator.userAgent.indexOf("Opera") != -1) opera = true
else if (document.all && !opera) ie = true
else if (!document.all && document.getElementById) dom = true;

function convertRGB(z)
        {
                var newfcS = "", splitter = "";
                splitter = z.split(",");
                splitter[0] = parseInt(splitter[0].substring(4, splitter[0].length));
                splitter[1] = parseInt(splitter[1]);
                splitter[2] = parseInt(splitter[2].substring(0, splitter[2].length-1));
                for (var q = 0; q < 3; q++)
                        {
                                splitter[q] = splitter[q].toString(16);
                                if (splitter[q].length == 1) splitter[q] = "0" + splitter[q];
                                newfcS += splitter[q];
                        }
                return newfcS;
        }

function currentColour(index)
        {
                var temp, cc;
                if (opera) cc = document.links[index].style.color
                else if (ie) cc = document.links[index].currentStyle.color
                else if (dom) cc = document.defaultView.getComputedStyle(document.links[index], '').getPropertyValue("color");
                if (cc.length == 4 && cc.substring(0, 1) == "#")
                        {
                                temp = "";
                                for (var a = 0; a < 3; a++)
                                        temp += cc.substring(a+1, a+2) + cc.substring(a+1, a+2);
                                cc = temp;
                        }
                else if (cc.indexOf("rgb") != -1) cc = convertRGB(cc)
                else if (cc.length == 7) cc = cc.substring(1, 7)
                else cc = fadeTo;
                return cc;
        }


function convert2Dec(hex)
        {
                var rgb = new Array();
                for (var u = 0; u < 3; u++)
                        rgb[u] = parseInt(hex.substring(u*2, u*2+2), 16);
                return rgb;
        }

function newRGB(f, n, d)
        {
                var change;
                if (d == 1) change = fiBy
                else change = foBy;
                for (var g = 0; g < 3; g++)
                        {
                                if (n[g] > f[g] && n[g] - change >= 0) n[g] -= change;
                                if (n[g] < f[g] && n[g] + change <= 255) n[g] += change;
                        }
                return n;
        }

function fade(index, d)
        {
                var fc, nc, temp = new Array(), finished = false;
                nc = convert2Dec(currentColour(index));
                if (d == 1) fc = convert2Dec(fadeTo)
                else fc = convert2Dec(ocs[x]);
                temp = convert2Dec(currentColour(index));
                nc = newRGB(fc, nc, d);
                if ((nc[0] == temp[0]) && (nc[1] == temp[1]) && (nc[2] == temp[2]))
                        finished = true;
                if (!finished) document.links[x].style.color = "rgb(" + nc[0] + "," + nc[1] + "," + nc[2] + ")"
                else clearInterval(fader);
        }

function findLink(over)
        {
                if (document.layers) return;
                if (fader)
                        {
                                clearInterval(fader);
                                document.links[x].style.color = "#" + ocs[x];
                        }
                if (over && !this.id) this.id = over;
                x = 0;
                while (!(this.id == document.links[x].id) && (x < document.links.length))
                        x++;
                if (this.id == document.links[x].id)
                        {
                                oc = currentColour(x);
                                fader = setInterval("fade(" + x  + ", 1)", speed);
                        }
        }

function clearFade()
        {
                if (document.layers) return;
                if (fader) clearInterval(fader);
                fader = setInterval("fade(" + x + ", 0)", speed);
        }

function init()
        {
                for (var i = 0; i < document.links.length; i++)
                        {
                                ocs[i] = currentColour(i);
                                var currentOver = document.links[i].onmouseover;
                                var currentOut = document.links[i].onmouseout;
                                var ignoreIt = document.links[i].className == ignoreClass;
                                if (!ignoreIt) document.links[i].id = "link" + i;
                                if (!currentOver && !currentOut && !ignoreIt)
                                        {
                                                document.links[i].onmouseover = findLink;
                                                document.links[i].onmouseout = clearFade;
                                        }
                        }
}

if (opera || ie || dom) window.onload = init;