iframe里面获取父级页面URL参数

getParam: function (name) {
        var reg = new RegExp('(^|&)' + name + '=([^&]*)(&|$)', 'i');
        var r = window.location.search.substr(1).match(reg);
        if (r != null) {
            return unescape(r[2]);
        }
        return null;
    },
    getParentParam: function (name) {
        var reg = new RegExp('(^|&)' + name + '=([^&]*)(&|$)', 'i');
        var r = window.parent.location.search.substr(1).match(reg);
        if (r != null) {
            return unescape(r[2]);
        }
        return null;
    },