我这个那里有问题，求指教
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb18030">
<title>Untitled Document</title>
</head>
<body>
<script type="text/javascript">
/*
* param1 Array
* param2 Array
* return true or false
*/
function arraysSimilar(arr1, arr2){
if(arr1 instanceof Array)||!(arr2 instanceof Array){
return false;
}
if(arr1.length!==arr2.length){
return false;
}
var i=0;
n=arr1.length;
countMap1={};
countMap2={};
var t1,t2;
TYPES=['string','boolean','number','undefined','null','function','date','window'];
for(;i<n;i++){
t1=typeOf(arr1[i]);
t2=typeOf(arr2[i]);
if(countMap1[t1]){
countMap1[t1]++;
}else{
countMap1[t1]=1;
}
if(countMap2[t2]){
countMap2[t2]++;
}else{
countMap2[t2]=1;
}
}
function typeOf(ele){
var r;
if(ele===null)r='null';
else if(ele instanceof Array) r='array';
else if(ele ===window) r='window';
else if(ele instanceof Date) r='date';
else r=typeof ele;
return r;
}
for(i=0,n=TYPES.length;i<n;i++){
if(countMap1[TYPES[i]]!==countMap2[TYPES[i]]){
return false;
}
}
return true;
}
</script>
<script src="testData.js"></script>
</body>
</html>
