this问题
<script type="text/javascript">
$(function(){
//alert("fdsa");
var e = {
        init: function() {
            this.$bigCateItem = $(".list-items");
this.$divmenu = $("#J_menu");
this.$ulmenu = $(".life-left-menu");
            var j = this;
            j.bindEvent()
        },
        bindEvent: function() {
           
            this.$bigCateItem.bind("mouseenter", this.onmouseenter);
           
        },onmouseenter:function(){
this.addclass("list-hover");
}
    };
    e.init()
})

</script>

现在报错：TypeError: this.addclass is not a function
[在此错误处中断] 

this.addclass("list-hover");
 

怎么解决啊
------解决方案--------------------
 init: function() {
var _this = this;
            this.$bigCateItem = $(".list-items");
this.$divmenu = $("#J_menu");
this.$ulmenu = $(".life-left-menu");
            var j = this;
            j.bindEvent()
        },
        bindEvent: function() {
           
            this.$bigCateItem.bind("mouseenter", this.onmouseenter);
           
        },onmouseenter:function(){
 _this.addclass("list-hover");
}