document.write('解析：
<script type="text/javascript">
Array.prototype.delrepeat = function(){
var arr = this;
var _arr = new Array();
for (var i in arr){
if (i == \'delrepeat\')continue;
if (_arr.length == 0) _arr.push(arr[i]);
for (var j = 0; j < _arr.length; j++){
if (arr[i] == _arr[j]){
break;
}
if(j > _arr.length - 2) _arr.push(arr[i]);
}
return _arr;
}
</script>
');