方法一:

復制代碼 代碼如下:

var ary = new Array("111","22","33","111");

var s = ary.join(",")+",";

for(var i=0;i<ary.length;i++) {

if(s.replace(ary[i]+",","").indexOf(ary[i]+",")>-1) {

alert("數組中有重復元素：" + ary[i]);

break;外語屋

}

}

復制代碼 代碼如下:

var ary = new Array("111","22","33","111");

var nary=ary.sort();

for(var i=0;i<ary.length;i++){

if (nary[i]==nary[i+1]){

alert("數組重復內容："+nary[i]);

}

}

復制代碼 代碼如下:

function isRepeat(arr){

var hash = {};

for(var i in arr) {

if(hash[arr[i]])

return true;

hash[arr[i]] = true;

}

return false;

}