                        课程
                    
                        /前端开发
                        
                            /JavaScript
                        
                        /JavaScript深入浅出

请问为什么啥都不显示

<!DOCTYPE HTML><html><head>    <meta http-equiv="Content-Type" content="text/html; charset=gb18030">    <title>Untitled Document</title>    </head><body><script type="text/javascript">   function arraysSimilar(arr1, arr2){  if(arr1.length==arr2.length){    var m=0;    for(var i=0;i<arr1.length;i++){        for(j=m;j<arr2.length;j++){            if(Object.prototype.toString.apply(arr1[i])==Object.prototype.toString.apply(arr2[j])){                var t=arr2[m];                arr2[m]=arr2[j];                arr2[j]=t;                m++;                break;            }            else{            }        }    }    if(m==arr1.length){        return true;    }    else{        return false;    }  }  else{    return false;  }}</script><script src="testData.js"></script></body></html>