js的一些方法兼容ie8的解决方案

1.解决，ie8不兼容Object.keys(array);  jsp页面加入以下代码   -----来源：http://blog.sina.com.cn/s/blog_6d63cf160102vbsg.html

var DONT_ENUM =  "propertyIsEnumerable,isPrototypeOf,hasOwnProperty,toLocaleString,toString,valueOf,constructor".split(","),
    hasOwn = ({}).hasOwnProperty;
    for (var i in {
        toString: 1
    }){
        DONT_ENUM = false;
    }


    Object.keys = Object.keys || function(obj){//ecma262v5 15.2.3.14
            var result = [];
            for(var key in obj ) if(hasOwn.call(obj,key)){
                result.push(key) ;
            }
            if(DONT_ENUM && obj){
                for(var i = 0 ;key = DONT_ENUM[i++]; ){
                    if(hasOwn.call(obj,key)){
                        result.push(key);
                    }
                }
            }
            return result;
        };


    
    function extend(dst) {
        var h = dst.$$hashKey;


        for (var i = 1, ii = arguments.length; i < ii; i++) {
            var obj = arguments[i];
            if (obj) {
                var keys = Object.keys(obj);
                for (var j = 0, jj = keys.length; j < jj; j++) {
                    var key = keys[j];
                    dst[key] = obj[key];
                }
            }
        }


        setHashKey(dst, h);
        return dst;
    }

2.解决，ie8不兼容  数组的filter()方法，加入以下demo----------------------------来源：http://www.cnblogs.com/guangyan/p/6684093.html

http://blog.csdn.net/shya_/article/details/62887840?fps=1&locationNum=9//indexOf,map,兼容问题

 Array.prototype.filter = Array.prototype.filter || function(func) {
         var arr = this;
         var r = [];
         for (var i = 0; i < arr.length; i++) {
             if (func(arr[i],i,arr)) {
                 r.push(arr[i]);
             }
         }
         return r;
     }

3.