看看这个索引问题
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title> New Document </title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<style type="text/css">
.s_btn {
background: url("img/i-1.0.0.png") repeat scroll 0 0 #DDDDDD;
cursor: pointer;
font-size: 14px;
height: 32px;
width: 95px;
}
.s_ipt_wr {
-moz-border-bottom-colors: none;
-moz-border-image: none;
-moz-border-left-colors: none;
-moz-border-right-colors: none;
-moz-border-top-colors: none;
background: url("i-1.0.0.png") no-repeat scroll -304px 0 transparent;
border-color: #9A9A9A #CDCDCD #CDCDCD #9A9A9A;
border-style: solid;
border-width: 1px;
display: inline-block;
height: 30px;
margin-right: 5px;
vertical-align: top;
width: 418px;
}
input {
border: 0 none;
padding: 0;
}
#language{
border:1px solid blue; position:relative;
}
#change{
position:absolute;
top:24px;
left:-50px;
list-style:none;
margin:0px;
padding:0px;
width:60px;
border:1px solid blue;
border-bottom:none;
display:none;
}
#change.active{display:block;}
#change li {border-bottom:1px solid blue;}
#change li.current{background:gray;}
</style>
<script type="text/javascript">
<!--
window.onload=function(){
var language = document.getElementById("language");
var change=document.getElementById("change");
var on=document.getElementById("on");
var lis=document.getElementsByTagName("li");
language.onclick=function(){
change.className='active';
}
for(var i=0;i<lis.length;i++){
lis[i].index = i;
lis[i].onmouseover=function(){
alert(i)
for(i=0;i<lis.length;i++){
lis[i].className='';
};
this.className='current';
}
lis[i].onclick=function(){
alert(i)
if(this.index==2){
on.innerHTML='输入法';
}else{
on.innerHTML=this.innerHTML;
}
change.className='';
}
};
};
//-->
</script>
</head>
<body>
<div style="text-align:center;">
<img src="baidu_sylogo1.gif"/></br/>
</div>
<div style="text-align:center;">
<span class="s_ipt_wr"><input/></span>
<input type="button" class="s_btn" value="百度一下"/>
<a id="on" href="javascript:;">输入法</a>
<span id="language">
<ul id="change">
<li>手写</li>
<li>拼音</li>
<li>关闭</li>
</ul>
</span>
</div>
</body>
</html>
在2个alert处的i为什么会一直输出3这个数字？？？？在for循环中的i一直都不可能等于3啊 因为长度为3 i走到 2的时候就会停止循环 求解 求解 说详细点 谢谢了
[解决办法]
(1)onload()函数执行后 i=3 ;
(2)onload()执行后 lis[i].onmouseover=function(){ alert(i);....}并没有执行；当你真正触发函数的时候 访问的i是onload执行过后的i
[解决办法]
循环结束了，i就是3啊。有错吗？
