ul li 缩进有关问题

ul是有序标签。默认会有内边距；

list-style:none;就是清除有序的样式；

padding;0 去除内边距

例子

#allTabLi ul {
    background: #ffffff none repeat scroll 0 0;
    left: auto;
    line-height: 27px;
    list-style: outside none none;
    margin-top: 2px;
    position: absolute;
    text-align: left;
    width: 100%;
    z-index: 999;
}

给ul添加 padding:0px的样式

#allTabLi ul {
    background: #ffffff none repeat scroll 0 0;
    left: auto;
    line-height: 27px;
    list-style: outside none none;
    margin-top: 2px;
    position: absolute;
    text-align: left;
    width: 100%;
    z-index: 999;
	padding:0
}