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                        /JavaScript深入浅出

照着老师给的代码打，可是不通过

<!DOCTYPE HTML>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>Untitled Document</title>
    
</head>
<body>
    <script type="text/javascript">   
        /*
         * param1 Array 
         * param2 Array
         * return true or false
         */
        function arraysSimilar(arr1, arr2){
        //判断边界
        if(!(arr1 instanceof Array)
        || !(arr2 instanceof Array)){
            return false;
        }
        
        //判断长度
        if(arr1.length != arr2.length) return false;
        
        var i = 0,
            n = arr1.length,
            countMap1 = {},
            countMap2 = {},
            t1,t2,
            t = ['string','boolean','number','undefined','null','window'];
            
        for(;i<n;i++){
            t1 = typeOf(arr1[i]);
            t2 = typeOf(arr2[i]);
            if(countMap1[t1]){
                countMap1++;
            } 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 = t.length;i<n;i++){
            if(countMap1[t[i]] !== countMap2[t[i]]){
                return false;
            }
        }
        return true;
        }
    </script>
    <script src="testData.js"></script>
</body>
</html>

检查几次了，找不到哪里出错，另外，这个代码好像没有给数组里的元素类型进行排序，这样不会出错吗？