【求助】JS添加一个背景图 小白求教

怎么添加一个背景图
{id:'menu',name:'按钮组',params:{num:'20%',style:'0',bgcolor:'#fff',},
data:[{id:'F0000000000001',imgurl:'',text:'',hrefurl:'',color:''},{id:'F0000000000002',imgurl:'',text:'',hrefurl:'',color:''},{id:'F0000000000003',imgurl:'',text:'',hrefurl:'',color:''},{id:'F0000000000004',imgurl:'',text:'',hrefurl:'',color:''},{id:'F0000000000005',imgurl:'',text:'',hrefurl:'',color:''}]
},