淡除淡入的连接

/*****************************************\
||    Fade Script Version 2.2     ||
|| http://anarchos.xs.mw/fade.phtml  ||
||       (c) Jan 2001       ||
|| ___________________________________ ||
||                    ||
|| Created by:              ||
|| Anarchos  > anarchos.xs.mw     ||
|| ___________________________________ ||
||                    ||
|| Color conversion from decimal to   ||
|| hex (dehexize function) by:      ||
|| Litejet > [email protected]     ||
|| ___________________________________ ||
||                    ||
|| Fade, hex, setColor functions by:   ||
|| Dak Phoenix > phoenix-archetypes.com ||
|| ___________________________________ ||
|| domouseover/out based on scripts by ||
|| The Shadow > www.icon.co.za/~andrewk ||
\*****************************************/

/*************
**** <config>
**/

startColor = "#303030"; // 初始色
endColor = "#a0a0a0"; // 最终色

stepIn = 17; // 淡入延迟
stepOut = 27; // 淡出延迟

debugIt = true; // 除错模式 true 或 false
sloppyClass = false; //相似类 true 或 false

/**
**** </config>
**************/

/*************
**** <install>
**

1.将文件存为"fade.js"后，在HTML里加上：
<script src="fade.js" language="Javascript"></script>

2.将所需此特效连接的"class"属性改为"fade".再给他加上唯一的"name"属性
例如:
<a href="blah.html" name="fading_link_1" class= "fade">click here</a>
注:唯一的"name"属性指不可以在HTML中有相同的"name"属性，否则会出错。如果除错模式是"true",遇到两个或多个相同的"name"属性会自动警告。

3。连接中不可以有<b>, <i>, <font>等标签.
例如:
<a href="blah.html" name="fading_link_1" class="fade"><b>click</b> here</a>
不会有任何特效

4.如果相似类为"true",且连接的"class"属性含有字串"fade".如:"dd_fade","fade_me".那此脚本对那些连接同样有效。
注：可以这样做：
<style>
.fader1 { font-size: 16pt; background-color: #46f;}
.iliketofade {font-family: Tahoma, Arial, Helvetica; text-decoration:underline;}
</style>
<script src="fade.js" language="Javascript"></script>
...
...
...
<a herf="somewhere" class="iliketofade" name="example">click me</s>

Have fun!
-Anarchos-

**
**** </install>
**************/

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;

startColor = dehexize(startColor.toLowerCase());
endColor = dehexize(endColor.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){
srcElement = event.srcElement;
if (srcElement.className == "fade" || (sloppyClass && srcElement.className.indexOf("fade") != -1)) {
    var linkName = srcElement.name;
    if (eval(linkName).length > 1){
      if (debugIt)
        alert("Fade error: " + eval(linkName).length + " links are named " + linkName + ".");
      }
    else
      fade(startColor,endColor,linkName,stepIn);
    }
     }
}

function domouseout() {
if (document.all){
srcElement = event.srcElement;
if (srcElement.className == "fade" || (sloppyClass && srcElement.className.indexOf("fade") != -1)) {
    var linkName = srcElement.name;
    if (eval(linkName).length > 1){
      }
    else
      fade(endColor,startColor,linkName,stepOut);
   }
  }
}

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){
setColor(sr,sg,sb,eval(fadeId[0]));
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;
}