ssmokingg55
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UID 93350
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注册 2007-5-21
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比较基础的问题！大哥们来看看！！
整段代码如下：
<script language="javascript">
var rate = 30;
var act = 0;
var elmH = 0;
var elmS = 128;
var elmV = 255;
var TimerID;
if (navigator.appName.indexOf("Microsoft",0) != -1 && parseInt(navigator.appVersion) >= 4) {
Browser = true;
} else {
Browser = false;
}
function doRainbowAnchor()
{
if (Browser && act != 1) {
object = event.srcElement;
while (object.tagName != 'A' && object.tagName != 'BODY') {
object = object.parentElement;
if ( object.tagName == 'BODY')
break;
}
if (object.tagName == 'A' && object.href != '') {
act = 1;
clrOrg = object.style.color;
TimerID = setInterval("ChangeColor()",100);
}
}
}
function stopRainbowAnchor()
{
if (Browser && act != 0) {
object.style.color=clrOrg;
clearInterval(TimerID);
act = 0;
}
}
function ChangeColor()
{
object.style.color = makeColor();
}
function makeColor()
{
if (elmS == 0) {
elmR = elmV; elmG = elmV; elmB = elmV;
}
else {
t1 = elmV;
t2 = (255 - elmS) * elmV / 255;
t3 = elmH % 60;
t3 = (t1 - t2) * t3 / 60;
if (elmH < 60) {
elmR = t1; elmB = t2; elmG = t2 + t3;
}
else if (elmH < 120) {
elmG = t1; elmB = t2; elmR = t1 - t3;
}
else if (elmH < 180) {
elmG = t1; elmR = t2; elmB = t2 + t3;
}
else if (elmH < 240) {
elmB = t1; elmR = t2; elmG = t1 - t3;
}
else if (elmH < 300) {
elmB = t1; elmG = t2; elmR = t2 + t3;
}
else if (elmH < 360) {
elmR = t1; elmG = t2; elmB = t1 - t3;
}
else {
elmR = 0; elmG = 0; elmB = 0;
}
}
elmR = Math.floor(elmR);
elmG = Math.floor(elmG);
elmB = Math.floor(elmB);
clrRGB = '#' + elmR.toString(16) + elmG.toString(16) + elmB.toString(16);
elmH = elmH + rate;
if (elmH >= 360)
elmH = 0;
return clrRGB;
}
document.onmouseover = doRainbowAnchor;
document.onmouseout = stopRainbowAnchor;
</script>
</HEAD>
<BODY>
<a href="www.baidu.com"><b>sdhjfhdsjkfhskjdfh></b></a>
</BODY>
</HTML>
其中代码：
function doRainbowAnchor()
{
if (Browser && act != 1) {
object = event.srcElement; //为什么把这句放在最顶端（即："var rate = 30"）就会没有对象？而必须放在这里？
while (object.tagName != 'A' && object.tagName != 'BODY') {
object = object.parentElement;
if ( object.tagName == 'BODY')
break;
}
if (object.tagName == 'A' && object.href != '') {
act = 1;
clrOrg = object.style.color;
TimerID = setInterval("ChangeColor()",100);
}
}
}
function stopRainbowAnchor()
{
if (Browser && act != 0) {
object.style.color=clrOrg; /*cirOrg是在前一个函数中用来获取初始颜色的变量，clrOrg是前一个函数的局部变量为什么在这个函数中也能引用？相同的问题
object是上个函数用来获取事件的变量，为什么这个函数也能引用？
clearInterval(TimerID);
act = 0;
}
}
希望哪位大侠帮忙则个，不胜感激！！
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