数组去重
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<script type="text/javascript">
var arr = [1,2,3,4,5,1,2,3,5]
var arr1 = [];
for (var i=0;i<arr.length;i++) {
if(arr1.indexOf(arr[i]) == -1){
arr1.push(arr[i]);
}
}
alert(arr1)
</script>
</body>
</html>
