/******************************************************************
*   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 = "de5aad";

// 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 = "menubar";

// 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;