var WHITELIST_CUSTOM = [{
    name: 'document',
    /**  document 允许使用以下属性或方法*/
    properties: ['getElementsByClassName']
    }]
    MIP.watch('i', function (newVal) {
    var ele2 = MIP.sandbox.document.getElementsByClassName('zg_fns');
    for(var s=0;s< ele2.length;s++){
    if(newVal==s){
    console.log(ele2[s].style.display)
    ele2[s].style.display = "block";
    }else{
    ele2[s].style.display = "none";
    }
    if(s==ele2.length){MIP.setData({i: ""})}
    }
    })