CSS------div无法覆盖图片全部如何处理

//获取Url地址中的参数
function getParameter(name) {
    //正则表达式
    var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
    var r = window.location.search.substr(1).match(reg);
    if (r != null) return unescape(r[2]); return null;
}

function getData() {
    $.post("../catalog/GetProductByFactor", {
        storeId: getParameter("storeId")
    }, function (data) {
        var str = "<ul>";
        for (var i = 0; i < data.length; i++) {
            str += "<li style = ‘border:1px solid red;display:inline-block‘>";
            str += "<img src = ‘/upload/store/" + getParameter("storeId") + "/product/show/thumb60_60/" + data[i].showimg + "‘/></li>";
            str += "</li>";
        }
        str += "</ul>";
        $(".goods-right-bottom").append(str);
    });
}